2018 United States Senate elections

November 6, 2018
November 27 (Mississippi runoff)

35 of the 100 seats in the United States Senate
51 seats needed for a majority
  Majority party Minority party
 
Leader Mitch McConnell Chuck Schumer
Party Republican Democratic
Leader since January 3, 2007 January 3, 2017
Leader's seat Kentucky New York
Seats before 51 47
Seats after 53 45
Seat change Increase 2 Decrease 2
Popular vote 34,687,875 52,224,867[lower-alpha 1][lower-alpha 2]
Percentage 38.7% 58.2%
Seats up 9 24
Races won 11 22

  Third party
 
Party Independent
Seats before 2[lower-alpha 3]
Seats after 2
Seat change Steady
Popular vote 808,370[lower-alpha 4]
Percentage 0.9%
Seats up 2
Races won 2

Results of the elections:
     Democratic gain      Republican gain
     Democratic hold      Republican hold
     Independent hold
     No election
Rectangular inset (Minn. & Miss.): both seats up for election

Majority Leader before election

Mitch McConnell
Republican

Elected Majority Leader

Mitch McConnell
Republican

The 2018 United States Senate elections were held on November 6, 2018. Among the 100 seats, the 33 of Class 1 were contested in regular elections while 2 others were contested in special elections due to Senate vacancies in Minnesota and Mississippi. The regular election winners were elected to 6-year terms running from January 3, 2019, to January 3, 2025. Senate Democrats had 26 seats up for election (including the seats of 2 independents who caucus with them), while Senate Republicans had 9 seats up for election.

To maintain their working majority of 50 senators and their party's vice president's tie-breaking vote, Republicans could only afford a net loss of 1 seat in these elections. The Republicans had a 52–48 majority after the 2016 elections, but they lost a seat in Alabama in December 2017 after Jeff Sessions resigned to become U.S. attorney general and Doug Jones, a Democrat, won in the subsequent special election. Three Republican-held seats were open as a result of retirements in Tennessee, Utah and Arizona. Although every Democratic incumbent ran for re-election, Democrats faced an extremely unfavorable map, defending 26 seats, of which 10 were in states won by Donald Trump in the 2016 presidential election, and 5 of those where Trump had won by more than 10%. Republicans, however, only had to defend 9 seats, of which only 1 was in a state won by Hillary Clinton in 2016.

The Republicans increased their majority by defeating Democratic incumbents in Florida, Indiana, Missouri, and North Dakota; and holding the open seats in Tennessee and Utah. In contrast, Democrats won 2 Republican-held seats, defeating an incumbent in Nevada and winning the open seat in Arizona.

The results for this election cycle were the only significant gains made by the Republicans in what was otherwise characterized as a "blue wave" election. The Republican gains in the Senate and the Democratic gains in the House marked the first mid-term election cycle since 1970 in which the president's party made net gains in one chamber of Congress while suffering net losses in the other,[3] which also occurred in 1914, 1962, and 2022. The 2018 election cycle was the first mid-term election cycle since 2002 in which any incumbents of the non-presidential party lost re-election. The number of defeated non-presidential party incumbents (4) was the most since the 1934 mid-terms.[4] As of 2023, this is the last time Republicans either won control of the Senate and/or made net gains in the chamber.

Partisan composition

Among the 33 Class 1 Senate seats up for regular election in 2018, twenty-three were held by Democrats, two by independents who caucused with the Senate Democrats and eight by Republicans. Class Two seats in Minnesota and Mississippi held by interim appointees were also up for election; both incumbent appointees sought election to finish their unexpired terms.

Democrats targeted Republican-held Senate seats in Arizona (open seat) and Nevada.[5] Seats in Texas,[6] Mississippi (at least one of the two seats) and Tennessee (open seat)[7] were also competitive for the Democrats. Republicans targeted Democratic-held seats in Indiana, Missouri, Montana, North Dakota and West Virginia, all of which were won by Republicans in both the 2012 and 2016 presidential elections.[8] Seats in Florida, Ohio, Pennsylvania, Wisconsin and Michigan, all of which were won by Obama in 2008 and 2012 but by Trump in 2016, were also targeted by Republicans.[5][9] The Democratic-held seat in New Jersey was also considered unexpectedly competitive due to corruption allegations surrounding the Democratic incumbent.

The map was widely characterized as extremely unfavorable to Democrats, as Democrats were defending 26 states while Republicans were defending nine. Of these seats, Democrats were defending ten in states won by Donald Trump in the 2016 presidential election, while Republicans were only defending one seat in a state won by Hillary Clinton in 2016.[10][11][12] According to FiveThirtyEight, Democrats faced the most unfavorable Senate map in 2018 that any party has ever faced in any election.[13][14]

Results summary

Parties Total
Democratic Republican Independent Libertarian Green Other
Last elections (2016) 46 52 2 0 0 0 100
Before these elections 47 51 2 0 0 0 100
Not up 23 42 0 65
Class 2 (20142020) 11 20 0 31
Class 3 (20162022) 12 22 0 34
Up 24 9 2 35
Class 1 (2012→2018) 23 8 2 33
Special: Class 2 1 1 0 2
Regular elections
Incumbent retired 0 3 0 3
Held by same party 2 2
Replaced by other party Decrease 1 Republican replaced by Increase 1 Democrat Steady Steady Steady Steady 1
Result 1 2 0 0 0 0 3
Incumbent ran 23 5 2 30
Won re-election 19 4 2 25
Lost re-election Decrease 1 Republican replaced by Increase 1 Democrat
Decrease 4 Democrats replaced by Increase 4 Republicans
Steady Steady Steady Steady 5
Result 20 8 2 0 0 0 30
Special elections
Appointee ran 1 1 2
Appointee elected 1 1 2
Result 1 1 0 0 0 0 2
Total elected 22 11 2 0 0 0 35
Net gain/loss Decrease 2 Increase 2 Steady Steady Steady Steady 2
Nationwide vote 52,224,867 34,722,926 808,370 590,051 200,599 1,262,765 90,473,222
Share 58.17% 38.67% 0.90% 0.66% 0.22% 1.41% 100%
Result 45 53 2 0 0 0 100

Source: Clerk of the U.S. House of Representatives.[1]

Change in composition

Each block represents one of the one hundred seats in the Senate. "D#" is a Democratic senator, "I#" is an independent senator and "R#" is a Republican senator. Arranged so parties are separated and a majority is clear by crossing the middle.

Before the elections

Each block indicates an incumbent senator's actions going into the election. Some "Ran" for re-election, some "Retired," and those without a note were not up for election this cycle. Before the elections, Republicans held 51 seats, Democrats held 47, and Independents held 2.

After the 2017 Senate special election in Alabama on the start of the second session in the 115th Congress.

D1
Ala.
Gain
D2 D3 D4 D5 D6 D7 D8 D9 D10
D20 D19 D18 D17 D16 D15 D14 D13 D12 D11
D21 D22 D23 D24
Calif.
Ran
D25
Conn.
Ran
D26
Del.
Ran
D27
Fla.
Ran
D28
Hawaii
Ran
D29
Ind.
Ran
D30
Md.
Ran
D40
N.D.
Ran
D39
N.Y.
Ran
D38
N.M.
Ran
D37
N.J.
Ran
D36
Mont.
Ran
D35
Mo.
Ran
D34
Minn. (sp)
Ran
D33
Minn. (reg)
Ran
D32
Mich.
Ran
D31
Mass.
Ran
D41
Ohio
Ran
D42
Penn.
Ran
D43
R.I.
Ran
D44
Va.
Ran
D45
Wash.
Ran
D46
W.Va.
Ran
D47
Wis.
Ran
I1
Maine
Ran
I2
Vt.
Ran
R51
Wyo.
Ran
Majority →
R41 R42 R43
Ariz.
Retired
R44
Miss. (reg)
Ran
R45
Miss. (sp)
Ran
R46
Neb.
Ran
R47
Nev.
Ran
R48
Tenn.
Retired
R49
Texas
Ran
R50
Utah
Retired
R40 R39 R38 R37 R36 R35 R34 R33 R32 R31
R21 R22 R23 R24 R25 R26 R27 R28 R29 R30
R20 R19 R18 R17 R16 R15 R14 R13 R12 R11
R1 R2 R3 R4 R5 R6 R7 R8 R9 R10

After the elections

Some senators were "Re-elected," some were a "Gain" in the seat from the other party (either by beating an incumbent or by winning an open seat), some were a "Hold" by the same party but with a different senator, and those without a note were not up for election this year.

After these elections, Democrats had 45 seats, independents had 2, and Republicans had 53.

D1 D2 D3 D4 D5 D6 D7 D8 D9 D10
D20 D19 D18 D17 D16 D15 D14 D13 D12 D11
D21 D22 D23 D24
Calif.
Re-elected
D25
Conn.
Re-elected
D26
Del.
Re-elected
D27
Hawaii
Re-elected
D28
Md.
Re-elected
D29
Mass.
Re-elected
D30
Mich.
Re-elected
D40
Va.
Re-elected
D39
R.I.
Re-elected
D38
Pa.
Re-elected
D37
Ohio
Re-elected
D36
N.Y.
Re-elected
D35
N.M.
Re-elected
D34
N.J.
Re-elected
D33
Mont.
Re-elected
D32
Minn. (sp)
Elected[lower-alpha 5]
D31
Minn. (reg)
Re-elected
D41
Wash.
Re-elected
D42
W.Va.
Re-elected
D43
Wis.
Re-elected
D44
Ariz.
Gain
D45
Nev.
Gain
I1
Maine
Re-elected
I2
Vt.
Re-elected
R53
N.D.
Gain
R52
Mo.
Gain
R51
Ind.
Gain
Majority →
R41 R42 R43
Miss. (reg)
Re-elected
R44
Miss. (sp)
Elected[lower-alpha 5]
R45
Neb.
Re-elected
R46
Tenn.
Hold
R47
Tex.
Re-elected
R48
Utah
Hold
R49
Wyo.
Re-elected
R50
Fla.
Gain
R40 R39 R38 R37 R36 R35 R34 R33 R32 R31
R21 R22 R23 R24 R25 R26 R27 R28 R29 R30
R20 R19 R18 R17 R16 R15 R14 R13 R12 R11
R1 R2 R3 R4 R5 R6 R7 R8 R9 R10
Key:
D# Democratic
R# Republican
I# Independent, caucusing with Democrats

Final pre-election predictions

Several sites and individuals publish predictions of competitive seats. These predictions look at factors such as the strength of the incumbent (if the incumbent is running for re-election) and the other candidates, and the state's partisan lean (reflected in part by the state's Cook Partisan Voting Index rating). The predictions assign ratings to each seat, indicating the predicted advantage that a party has in winning that seat.

Most election predictors used:

  • "tossup": no advantage
  • "tilt" (used by some predictors): advantage that is not quite as strong as "lean"
  • "lean": slight advantage
  • "likely" or "favored": significant, but surmountable, advantage
  • "safe" or "solid": near-certain chance of victory
Constituency Incumbent 2018 election ratings
State PVI[15] Senator Last
election[lower-alpha 6]
Cook
Oct 26,
2018
[16]
IE
Nov 1,
2018
[17]
Sabato
Nov 5,
2018
[18]
NYT
Nov 5,
2018
[19]
Fox News[lower-alpha 7]
Nov 5,
2018
[20]
CNN
Nov 2,
2018
[21]
RCP
Nov 5,
2018
[22]
Daily Kos
Nov 5,
2018
[23]
Politico
Nov 5,
2018
[24]
538[lower-alpha 8]
Nov 6,
2018
[25]
Result
Arizona R+5 Jeff Flake
(retiring)
49.2% R Tossup Tilt D (flip) Lean D (flip) Tossup Tossup Tossup Tossup Tossup Tossup Lean D (flip) Sinema
50.0% D (flip)
California D+12 Dianne Feinstein 62.5% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Feinstein
54.2% D
Connecticut D+6 Chris Murphy 54.8% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Murphy
59.5% D
Delaware D+6 Tom Carper 66.4% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Carper
60.0% D
Florida R+2 Bill Nelson 55.2% D Tossup Tilt D Lean D Tossup Tossup Tossup Tossup Tossup Tossup Lean D Scott
50.1% R (flip)
Hawaii D+18 Mazie Hirono 62.6% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Hirono
71.2% D
Indiana R+9 Joe Donnelly 50.0% D Tossup Tossup Lean R (flip) Tossup Tossup Tossup Tossup Tossup Tossup Lean D Braun
50.7% R (flip)
Maine D+3 Angus King 52.9% I Safe I Safe I Safe I Safe I Likely I Safe I Safe I Safe I Safe I Safe I King
54.3% I
Maryland D+12 Ben Cardin 56.0% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Cardin
64.9% D
Massachusetts D+12 Elizabeth Warren 53.7% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Warren
60.3% D
Michigan D+1 Debbie Stabenow 58.8% D Likely D Safe D Safe D Likely D Likely D Likely D Lean D Safe D Likely D Safe D Stabenow
52.3% D
Minnesota
(regular)
D+1 Amy Klobuchar 65.2% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Klobuchar
60.3% D
Minnesota
(special)
D+1 Tina Smith Appointed
(2018)[lower-alpha 9]
Lean D Likely D Likely D Lean D Likely D Likely D Lean D Likely D Likely D Likely D Smith
53.0% D
Mississippi
(regular)
R+9 Roger Wicker 57.1% R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Wicker
58.5% R
Mississippi
(special)[lower-alpha 10]
R+9 Cindy Hyde-Smith Appointed
(2018)[lower-alpha 11]
Lean R Safe R Likely R Lean R Lean R Safe R Likely R Likely R Likely R Lean R Hyde-Smith
53.6% R
Missouri R+9 Claire McCaskill 54.8% D Tossup Tilt R (flip) Lean R (flip) Tossup Tossup Tossup Tossup Tossup Tossup Tossup Hawley
51.4% R (flip)
Montana R+11 Jon Tester 48.6% D Tossup Tilt D Lean D Tossup Lean D Lean D Tossup Tossup Lean D Likely D Tester
50.3% D
Nebraska R+14 Deb Fischer 57.8% R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Fischer
57.7% R
Nevada D+1 Dean Heller 45.9% R Tossup Tilt D (flip) Lean D (flip) Tossup Tossup Tossup Tossup Tossup Tossup Tossup Rosen
50.4% D (flip)
New Jersey D+7 Bob Menendez 58.9% D Tossup Likely D Likely D Tossup Lean D Lean D Lean D Lean D Lean D Likely D Menendez
54.0% D
New Mexico D+3 Martin Heinrich 51.0% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Heinrich
54.1% D
New York D+11 Kirsten Gillibrand 72.2% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Gillibrand
67.0% D
North Dakota R+16 Heidi Heitkamp 50.2% D Lean R (flip) Lean R (flip) Lean R (flip) Lean R (flip) Likely R (flip) Lean R (flip) Lean R (flip) Lean R (flip) Lean R (flip) Lean R (flip) Cramer
55.4% R (flip)
Ohio R+3 Sherrod Brown 50.7% D Likely D Safe D Likely D Likely D Likely D Likely D Lean D Likely D Likely D Safe D Brown
53.4% D
Pennsylvania EVEN Bob Casey Jr. 53.7% D Likely D Safe D Safe D Likely D Likely D Likely D Likely D Safe D Likely D Safe D Casey
55.7% D
Rhode Island D+10 Sheldon Whitehouse 64.8% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Whitehouse
61.5% D
Tennessee R+14 Bob Corker
(retiring)
64.9% R Tossup Lean R Lean R Tossup Lean R Tossup Tossup Lean R Lean R Likely R Blackburn
54.7% R
Texas R+8 Ted Cruz 56.5% R Tossup Likely R Lean R Tossup Lean R Lean R Lean R Lean R Lean R Likely R Cruz
50.9% R
Utah R+20 Orrin Hatch
(retiring)
65.3% R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Romney
62.6% R
Vermont D+15 Bernie Sanders 71.0% I Safe I Safe I Safe I Safe I Likely I Safe I Safe I Safe I Safe I Safe I Sanders
67.4% I
Virginia D+1 Tim Kaine 52.3% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Kaine
57.0% D
Washington D+7 Maria Cantwell 60.4% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Cantwell
58.3% D
West Virginia R+20 Joe Manchin 60.6% D Lean D Tilt D Lean D Lean D Lean D Lean D Tossup Lean D Lean D Likely D Manchin
49.6% D
Wisconsin EVEN Tammy Baldwin 51.4% D Likely D Safe D Likely D Likely D Likely D Likely D Lean D Likely D Likely D Safe D Baldwin
55.4% D
Wyoming R+25 John Barrasso 75.7% R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Barrasso
67.0% R
Overall[lower-alpha 12] D - 43
R - 48
9 tossups
D - 48
R - 51
1 tossup
D - 48
R - 52
0 tossups
D - 43
R - 48
9 tossups
D - 45
R - 50
5 tossups
D - 45
R - 49
6 tossups
D - 43
R - 49
8 tossups
D - 44
R - 50
6 tossups
D - 45
R - 50
5 tossups
D - 48
R - 50
2 tossups
Results:
D - 47
R - 53

Election dates

These are the election dates for the regularly scheduled general elections.

State Filing
deadline[26]
Primary
election[27]
Primary
run-off
(if necessary)[27]
General
election
Poll closing
(Eastern Time)[28]
Arizona May 30, 2018 August 28, 2018 N/A November 6, 2018 9pm
California March 9, 2018 June 5, 2018 N/A November 6, 2018 11pm
Connecticut June 12, 2018 August 14, 2018 N/A November 6, 2018 8pm
Delaware July 10, 2018 September 6, 2018 N/A November 6, 2018 8pm
Florida May 4, 2018 August 28, 2018 N/A November 6, 2018 7pm and 8pm
Hawaii June 5, 2018 August 11, 2018 N/A November 6, 2018 11pm
Indiana February 9, 2018 May 8, 2018 N/A November 6, 2018 6pm and 7pm
Maine March 15, 2018 June 12, 2018 N/A November 6, 2018 8pm
Maryland February 27, 2018 June 26, 2018 N/A November 6, 2018 8pm
Massachusetts June 5, 2018 September 4, 2018 N/A November 6, 2018 8pm
Michigan April 24, 2018 August 7, 2018 N/A November 6, 2018 8pm and 9pm
Minnesota June 5, 2018 August 14, 2018 N/A November 6, 2018 9pm
Mississippi March 1, 2018 June 5, 2018 June 26, 2018 November 6, 2018 8pm
Mississippi (special) March 26, 2018 November 6, 2018 N/A November 27, 2018[lower-alpha 13] 8pm
Missouri March 27, 2018 August 7, 2018 N/A November 6, 2018 8pm
Montana March 12, 2018 June 5, 2018 N/A November 6, 2018 10pm
Nebraska March 1, 2018 May 15, 2018 N/A November 6, 2018 9pm
Nevada March 16, 2018 June 12, 2018 N/A November 6, 2018 10pm
New Jersey April 2, 2018 June 5, 2018 N/A November 6, 2018 8pm
New Mexico March 13, 2018 June 5, 2018 N/A November 6, 2018 9pm
New York April 12, 2018 June 26, 2018 N/A November 6, 2018 9pm
North Dakota April 9, 2018 June 12, 2018 N/A November 6, 2018 8pm and 9pm
Ohio February 7, 2018 May 8, 2018 N/A November 6, 2018 7:30pm
Pennsylvania March 20, 2018 May 15, 2018 N/A November 6, 2018 8pm
Rhode Island June 27, 2018 September 12, 2018 N/A November 6, 2018 8pm
Tennessee April 5, 2018 August 2, 2018 N/A November 6, 2018 8pm
Texas December 11, 2017 March 6, 2018 May 22, 2018
(unnecessary)
November 6, 2018 8pm and 9pm
Utah March 15, 2018 June 26, 2018 N/A November 6, 2018 10pm
Vermont May 31, 2018 August 14, 2018 N/A November 6, 2018 7pm
Virginia March 29, 2018 June 12, 2018 N/A November 6, 2018 7pm
Washington May 18, 2018 August 7, 2018 N/A November 6, 2018 11pm
West Virginia January 27, 2018 May 8, 2018 N/A November 6, 2018 7:30pm
Wisconsin June 1, 2018 August 14, 2018 N/A November 6, 2018 9pm
Wyoming June 1, 2018 August 21, 2018 N/A November 6, 2018 9pm

Gains and losses

Retirements

Three Republicans retired instead of seeking re-election.

State Senator Replaced by
Arizona Jeff Flake Kyrsten Sinema
Tennessee Bob Corker Marsha Blackburn
Utah Orrin Hatch Mitt Romney

Defeats

Four Democrats and one Republican sought re-election but lost in the general election.

State Senator Replaced by
Florida Bill Nelson Rick Scott
Indiana Joe Donnelly Mike Braun
Missouri Claire McCaskill Josh Hawley
Nevada Dean Heller Jacky Rosen
North Dakota Heidi Heitkamp Kevin Cramer

Post-election changes

One Republican resigned before the start of the 116th Congress on December 31, 2018, one other Republican also resigned during the 116th Congress due to health reasons. Initially, all were replaced by Republican appointees.

State Senator Replaced by
Arizona
(Class 3)
Jon Kyl Martha McSally
Georgia
(Class 3)
Johnny Isakson Kelly Loeffler

Race summary

Special elections during the preceding Congress

In these special elections, the winners will be seated before January 3, 2019, when elected and qualified. They are ordered by election date, then by state and by class.

State
(linked to
summaries below)
Incumbent Results Candidates
Senator Party Electoral
history
Minnesota
(Class 2)
Tina Smith DFL 2018 (Appointed) Interim appointee elected.
Mississippi
(Class 2)
Cindy Hyde-Smith Republican 2018 (Appointed) Interim appointee elected.

Elections leading to the next Congress

In these general elections, the winners were elected for the term beginning January 3, 2019.

All of the elections involve the Class 1 seats and they are ordered by state.

State
(linked to
summaries below)
Incumbent Results Candidates
Senator Party Electoral
history
Arizona Jeff Flake Republican 2012 Incumbent retired.
New senator elected.
Democratic gain.
California Dianne Feinstein Democratic 1992 (special)
1994
2000
2006
2012
Incumbent re-elected.
Connecticut Chris Murphy Democratic 2012 Incumbent re-elected.
  • Green tickY Chris Murphy (Democratic) 59.5%
  • Matthew Corey (Republican) 39.4%
  • Richard Lion (Libertarian) 0.6%
  • Jeff Russell (Green) 0.5%
Delaware Tom Carper Democratic 2000
2006
2012
Incumbent re-elected.
  • Green tickY Tom Carper (Democratic) 60.0%
  • Robert Arlett (Republican) 37.8%
  • Demitri Theodoropoulos (Green) 1.2%
  • Nadine Frost (Libertarian) 1.1%
Florida Bill Nelson Democratic 2000
2006
2012
Incumbent lost re-election.
New senator elected.
Republican gain.
Winner delayed term until January 8, 2019, to finish his term as Governor of Florida.
Hawaii Mazie Hirono Democratic 2012 Incumbent re-elected.
  • Green tickY Mazie Hirono (Democratic) 71.2%
  • Ron Curtis (Republican) 28.8%
Indiana Joe Donnelly Democratic 2012 Incumbent lost re-election.
New senator elected.
Republican gain.
Maine Angus King Independent 2012 Incumbent re-elected.
  • Green tickY Angus King (Independent) 54.3%
  • Eric Brakey (Republican) 35.2%
  • Zak Ringelstein (Democratic) 10.4%
Maryland Ben Cardin Democratic 2006
2012
Incumbent re-elected.
  • Green tickY Ben Cardin (Democratic) 64.9%
  • Tony Campbell (Republican) 30.3%
  • Neal Simon (Independent) 3.7%
  • Arvin Vohra (Libertarian) 1%
  • Michael Puskar (Independent) (write-in)
Massachusetts Elizabeth Warren Democratic 2012 Incumbent re-elected.
Michigan Debbie Stabenow Democratic 2000
2006
2012
Incumbent re-elected.
  • Green tickY Debbie Stabenow (Democratic) 52.3%
  • John James (Republican) 45.8%
  • Marcia Squier (Independent) 1%
  • George Huffman III (Constitution) 0.6%
  • John Wilhelm (Natural Law) 0.4%
Minnesota Amy Klobuchar DFL 2006
2012
Incumbent re-elected.
  • Green tickY Amy Klobuchar (DFL) 60.3%
  • Jim Newberger (Republican) 36.2%
  • Dennis Schuller (Legal Marijuana Now) 2.5%
  • Paula M. Overby (Green) 0.9%
Mississippi Roger Wicker Republican 2007 (Appointed)
2008 (special)
2012
Incumbent re-elected.
  • Green tickY Roger Wicker (Republican) 58.5%
  • David Baria (Democratic) 39.5%
  • Danny Bedwell (Libertarian) 1.4%
  • Shawn O'Hara (Reform) 0.6%
Missouri Claire McCaskill Democratic 2006
2012
Incumbent lost re-election.
New senator elected.
Republican gain.
  • Green tickY Josh Hawley (Republican) 51.4%
  • Claire McCaskill (Democratic) 45.6%
  • Craig O'Dear (Independent) 1.4%
  • Japheth Campbell (Libertarian) 1.1%
  • Jo Crain (Green) 0.5%
Montana Jon Tester Democratic 2006
2012
Incumbent re-elected.
Nebraska Deb Fischer Republican 2012 Incumbent re-elected.
Nevada Dean Heller Republican 2011 (Appointed)
2012
Incumbent lost re-election.
New senator elected.
Democratic gain.
  • Green tickY Jacky Rosen (Democratic) 50.4%
  • Dean Heller (Republican) 45.4%
  • Barry Michaels (Independent) 1%
  • Tim Hagan (Libertarian) 0.9%
  • Kamau Bakari (Independent American) 0.7%
New Jersey Bob Menendez Democratic 2006 (Appointed)
2006
2012
Incumbent re-elected.
Others
  • Natalie Rivera (For The People) 0.6%
  • Tricia Flanagan (New Day NJ) 0.5%
  • Kevin Kimple (Make It Simple) 0.3%
  • Hank Schroeder (Economic Growth) 0.3%
New Mexico Martin Heinrich Democratic 2012 Incumbent re-elected.
New York Kirsten Gillibrand Democratic 2009 (Appointed)
2010 (special)
2012
Incumbent re-elected.
North Dakota Heidi Heitkamp Democratic-NPL 2012 Incumbent lost re-election.
New senator elected.
Republican gain.
Ohio Sherrod Brown Democratic 2006
2012
Incumbent re-elected.
Pennsylvania Bob Casey Jr. Democratic 2006
2012
Incumbent re-elected.
  • Green tickY Bob Casey Jr. (Democratic) 55.7%
  • Lou Barletta (Republican) 42.6%
  • Dale Kerns (Libertarian) 1%
  • Neal Gale (Green) 0.6%
Rhode Island Sheldon Whitehouse Democratic 2006
2012
Incumbent re-elected.
Tennessee Bob Corker Republican 2006
2012
Incumbent retired.
New senator elected.
Republican hold.
Others
  • Trudy Austin (Independent) 0.4%
  • Dean Hill (Independent) 0.4%
  • Kris Todd (Independent) 0.2%
  • John Carico (Independent) 0.2%
  • Breton Phillips (Independent) 0.1%
  • Kevin McCants (Independent) 0.1%
Texas Ted Cruz Republican 2012 Incumbent re-elected.
Utah Orrin Hatch Republican 1976
1982
1988
1994
2000
2006
2012
Incumbent retired.
New senator elected.
Republican hold.
  • Green tickY Mitt Romney (Republican) 62.6%
  • Jenny Wilson (Democratic) 30.9%
  • Tim Aalders (Constitution) 2.7%
  • Craig Bowden (Libertarian) 2.6%
  • Reed McCandless (Independent American) 1.2%
Vermont Bernie Sanders Independent 2006
2012
Incumbent re-elected.
  • Green tickY Bernie Sanders (Independent) 67.4%
  • Lawrence Zupan (Republican) 27.5%
Virginia Tim Kaine Democratic 2012 Incumbent re-elected.
Washington Maria Cantwell Democratic 2000
2006
2012
Incumbent re-elected.
West Virginia Joe Manchin Democratic 2010 (special)
2012
Incumbent re-elected.
Wisconsin Tammy Baldwin Democratic 2012 Incumbent re-elected.
Wyoming John Barrasso Republican 2007 (Appointed)
2008 (special)
2012
Incumbent re-elected.

Closest races

In twelve races the margin of victory was under 10% (although in California, the Senate race was fought between two members of the Democratic Party, Dianne Feinstein and Kevin de Leon, because of California's run-off system).

State Party of winner Margin
Florida Republican (flip) 0.12%
Arizona Democratic (flip) 2.34%
Texas Republican 2.57%
West Virginia Democratic 3.31%
Montana Democratic 3.55%
Nevada Democratic (flip) 5.03%
Missouri Republican (flip) 5.81%
Indiana Republican (flip) 5.89%[lower-alpha 14]
Michigan Democratic 6.51%
Ohio Democratic 6.85%
Mississippi (special) Republican 7.27%
California Democratic 8.33%[lower-alpha 15]

Arizona

Arizona election

Turnout64.85%
 
Nominee Kyrsten Sinema Martha McSally
Party Democratic Republican
Popular vote 1,191,100 1,135,200
Percentage 49.96% 47.61%

County results

U.S. senator before election

Jeff Flake
Republican

Elected U.S. senator

Kyrsten Sinema
Democratic

One-term Republican Jeff Flake was elected with 49% of the vote in 2012. He chose not to run for re-election.[30]

U.S. Representative Martha McSally[31] won the Republican nomination in a three-way primary on August 28, 2018, against Joe Arpaio and Kelli Ward.

U.S. Representative Kyrsten Sinema[31] easily secured the Democratic nomination.

Sinema defeated McSally by a slim margin; her victory became official only after six days of counting ballots.

Arizona Republican primary
Party Candidate Votes %
Republican Martha McSally 357,626 54.57
Republican Kelli Ward 180,926 27.61
Republican Joe Arpaio 116,555 17.79
Write-in 191 0.03
Total votes 655,298 100.00
Arizona Democratic primary
Party Candidate Votes %
Democratic Kyrsten Sinema 404,170 79.25
Democratic Deedra Abboud 105,800 20.75
Total votes 509,970 100.00
Arizona general election[32]
Party Candidate Votes % ±%
Democratic Kyrsten Sinema 1,191,100 49.96% +3.76
Republican Martha McSally 1,135,200 47.61% –1.62
Green Angela Green 57,442 2.41% N/A
Write-in 566 0.02% +0.01
Total votes 2,384,308 100.00%
Democratic gain from Republican

California

California election

Turnout56.42%
 
Nominee Dianne Feinstein Kevin de León
Party Democratic Democratic
Popular vote 6,019,422 5,093,942
Percentage 54.16% 45.84%

County results

U.S. senator before election

Dianne Feinstein
Democratic

Elected U.S. senator

Dianne Feinstein
Democratic

Four-term Democrat Dianne Feinstein won a special election in 1992 and was elected to full terms in 1994, 2000, 2006, and 2012. She ran for re-election and advanced to the general election after securing the top spot in the June 5 jungle primary.[33]

The June 5 primary ballot listed 32 candidates (Feinstein plus 31 challengers) in addition to 3 write-in candidates. There were 10 Democratic candidates, 11 Republican candidates, one Libertarian, one Peace and Freedom candidate, and 9 independent candidates. There was also a Green Party candidate who ran as a write-in.

President pro tempore of the California State Senate Kevin de León advanced to the general election for the right to challenge Feinstein after securing the second spot in the primary.[33]

The 11 Republican candidates who ran in the primary combined for 33.2% of the vote. The top Republican candidate, James P. Bradley, received 8.3% of the vote, which put him in 3rd place at 3.8% behind the second-place finisher, Kevin DeLeon.[34]

On November 6, Dianne Feinstein was elected to a fifth term, defeating Kevin de León.

California blanket primary
Party Candidate Votes %
Democratic Dianne Feinstein (incumbent) 2,947,035 44.18
Democratic Kevin de León 805,446 12.07
Republican James P. Bradley 556,252 8.34
Republican Arun K. Bhumitra 350,815 5.26
Republican Paul A. Taylor 323,534 4.85
Republican Erin Cruz 267,494 4.01
Republican Tom Palzer 205,183 3.08
Democratic Alison Hartson 147,061 2.20
Republican Rocky De La Fuente 135,279 2.03
Democratic Pat Harris 126,947 1.90
Republican John "Jack" Crew 93,808 1.41
Republican Patrick Little 89,867 1.35
Republican Kevin Mottus 87,646 1.31
Republican Jerry Joseph Laws 67,140 1.01
Libertarian Derrick Michael Reid 60,000 0.90
Democratic Adrienne Nicole Edwards 56,172 0.84
Democratic Douglas Howard Pierce 42,671 0.64
Republican Mario Nabliba 39,209 0.59
Democratic David Hildebrand 30,305 0.45
Democratic Donnie O. Turner 30,101 0.45
Democratic Herbert G. Peters 27,468 0.41
No party preference David Moore 24,614 0.37
No party preference Ling Ling Shi 23,506 0.35
Peace and Freedom John Parker 22,825 0.34
No party preference Lee Olson 20,393 0.31
Democratic Gerald Plummer 18,234 0.27
No party preference Jason M. Hanania 18,171 0.27
No party preference Don J. Grundmann 15,125 0.23
No party preference Colleen Shea Fernald 13,536 0.20
No party preference Rash Bihari Ghosh 12,557 0.19
No party preference Tim Gildersleeve 8,482 0.13
No party preference Michael Fahmy Girgis 2,986 0.04
Write-in 863 0.01
Total votes 6,670,720 100.00
California general election[32]
Party Candidate Votes % ±%
Democratic Dianne Feinstein (incumbent) 6,019,422 54.16% –8.36
Democratic Kevin de León 5,093,942 45.84% N/A
Total votes 11,113,364 100.00%
Democratic hold

Connecticut

Connecticut election

Turnout63.58%
 
Nominee Chris Murphy Matthew Corey
Party Democratic Republican
Popular vote 825,579 545,717
Percentage 59.53% 39.35%

Municipality results

U.S. senator before election

Chris Murphy
Democratic

Elected U.S. senator

Chris Murphy
Democratic

One-term Democrat Chris Murphy was elected with 55% of the vote in 2012. He ran for re-election.[35]

Businessmen Matthew Corey[36] received the Republican nomination.

Chris Murphy was elected to a second term, winning nearly 60% of the vote.[37]

Connecticut Republican primary
Party Candidate Votes %
Republican Matthew Corey 99,899 76.54
Republican Dominic Rapini 30,624 23.46
Total votes 130,523 100.00
Connecticut general election[32]
Party Candidate Votes % ±%
Democratic Chris Murphy (incumbent) 825,579 59.53% +4.71
Republican Matthew Corey 545,717 39.35% –3.72
Libertarian Richard Lion 8,838 0.64% –1.02
Green Jeff Russell 6,618 0.48% N/A
Write-in 88 0.01% –0.44
Total votes 1,386,840 100.00%
Democratic hold

Delaware

Delaware election

Turnout52.18%
 
Nominee Tom Carper Rob Arlett
Party Democratic Republican
Popular vote 217,385 137,127
Percentage 59.95% 37.81%

County results

U.S. senator before election

Tom Carper
Democratic

Elected U.S. senator

Tom Carper
Democratic

Three-term Democrat Tom Carper won re-election with 66% of the vote in 2012. He announced he was running for re-election during an interview on MSNBC on July 24, 2017.[38] He defeated Dover community activist Kerri Evelyn Harris for the Democratic nomination. Sussex County Councilman Robert Arlett won the Republican nomination.[38]

Tom Carper defeated Arlett, winning 60% of the vote.[39]

Delaware Democratic primary
Party Candidate Votes %
Democratic Tom Carper (incumbent) 53,635 64.59
Democratic Kerri Evelyn Harris 29,407 35.41
Total votes 83,042 100.00
Delaware Republican primary
Party Candidate Votes %
Republican Rob Arlett 25,284 66.77
Republican Gene Truono 10,587 27.96
Republican Rocky De La Fuente 1,998 5.28
Total votes 37,870 100.00
Delaware general election[32]
Party Candidate Votes % ±%
Democratic Tom Carper (incumbent) 217,385 59.95% –6.47
Republican Rob Arlett 137,127 37.82% +8.87
Green Demitri Theodoropoulos 4,170 1.15% +0.35
Libertarian Nadine Frost 3,910 1.08% N/A
Write-in 14 0.00% N/A
Total votes 362,606 100.00%
Democratic hold

Florida

Florida election

Turnout61.68%
 
Nominee Rick Scott Bill Nelson
Party Republican Democratic
Popular vote 4,099,505 4,089,472
Percentage 50.05% 49.93%

County results

U.S. senator before election

Bill Nelson
Democratic

Elected U.S. senator

Rick Scott
Republican

Three-term Democrat Bill Nelson was re-elected with 55% of the vote in 2012. He sought re-election to a fourth term in office.[40]

Florida Governor Rick Scott won the Republican nomination. First elected in 2010 and re-elected in 2014, Scott's term as Governor of Florida was set to end by January 2019, due to term limits.[40]

Edward Janowski was running as an independent, but did not qualify.[40]

Scott led among ballots tallied on election night, but given the close margins of the race recounts were ordered.[41] Final recount numbers were released following a machine and hand recount with Rick Scott maintaining a lead.[42] On November 18, Nelson conceded to Scott.[43] Two days later, election results were certified by the state, cementing Scott's win.[44]

Florida Republican primary
Party Candidate Votes %
Republican Rick Scott 1,456,187 88.61
Republican Rocky De La Fuente 187,209 11.39
Total votes 1,643,396 100.00
Florida general election[32]
Party Candidate Votes % ±%
Republican Rick Scott 4,099,505 50.05% +7.82
Democratic Bill Nelson (incumbent) 4,089,472 49.93% –5.30
Write-in 1,028 0.01% +0.01
Total votes 8,190,005 100.00%
Republican gain from Democratic

Hawaii

Hawaii election

Turnout51.32%
 
Nominee Mazie Hirono Ron Curtis
Party Democratic Republican
Popular vote 276,316 112,035
Percentage 71.15% 28.85%

County results

U.S. senator before election

Mazie Hirono
Democratic

Elected U.S. senator

Mazie Hirono
Democratic

One-term Democrat Mazie Hirono was elected with 63% of the vote in 2012. She ran.[45]

Ron Curtis was the Republican nominee.

Hirono was elected to a second term by a landslide.

Hawaii Democratic primary
Party Candidate Votes %
Democratic Mazie Hirono (incumbent) 201,679 100.00
Total votes 201,679 100.00
Hawaii Republican primary
Party Candidate Votes %
Republican Ron Curtis 6,370 23.73
Republican Consuelo Anderson 5,172 19.26
Republican Robert C. Helsham Sr. 3,988 14.85
Republican Thomas E. White 3,661 13.64
Republican Rocky De La Fuente 3,065 11.42
Republican George L. Berish 1,658 6.18
Republican Michael R. Hodgkiss 1,576 5.87
Republican Eddie Pirkowski 1,358 5.06
Total votes 26,848 100.00
Hawaii general election[32]
Party Candidate Votes % ±%
Democratic Mazie Hirono (incumbent) 276,316 71.15% +8.55
Republican Ron Curtis 112,035 28.85% –8.55
Total votes 388,351 100.00%
Democratic hold

Indiana

Indiana election

Turnout50.42%
 
Nominee Mike Braun Joe Donnelly
Party Republican Democratic
Popular vote 1,158,000 1,023,553
Percentage 50.73% 44.84%

County results

U.S. senator before election

Joe Donnelly
Democratic

Elected U.S. senator

Mike Braun
Republican

One-term Democrat Joe Donnelly was elected with 50.04% of the vote in 2012. He ran. He won the Democratic primary unopposed.[46]

State Representative Mike Braun[46] won the May 8 Republican primary. U.S. Representatives Luke Messer[47] and Todd Rokita[47] also ran for the Republican nomination.

James Johnson ran as an independent.[46]

Braun won election with 51% of the vote, defeating Joe Donnelly.[48]

Indiana Democratic primary
Party Candidate Votes %
Democratic Joe Donnelly (incumbent) 284,621 100.00
Total votes 284,621 100.00
Indiana Republican primary
Party Candidate Votes %
Republican Mike Braun 208,602 41.17
Republican Todd Rokita 151,967 29.99
Republican Luke Messer 146,131 28.84
Total votes 506,700 100.00
Indiana general election[32]
Party Candidate Votes % ±%
Republican Mike Braun 1,158,000 50.73% +6.45
Democratic Joe Donnelly (incumbent) 1,023,553 44.84% –5.20
Libertarian Lucy Brenton 100,942 4.42% –1.26
Write-in 70 0.00% N/A
Total votes 2,282,565 100.00%
Republican gain from Democratic

Maine

Maine election

Turnout59.96%
 
Nominee Angus King Eric Brakey Zak Ringelstein
Party Independent Republican Democratic
Popular vote 344,575 223,502 66,268
Percentage 54.31% 35.23% 10.45%

County results

U.S. senator before election

Angus King
Independent

Elected U.S. senator

Angus King
Independent

One-term Independent Senator Angus King was elected in a three-way race with 53% of the vote in 2012. King has caucused with the Democratic Party since taking office in 2013, but he has left open the possibility of caucusing with the Republican Party in the future.[49]

State Senator Eric Brakey ran unopposed for the Republican nomination.[50]

Public school teacher and founder of UClass Zak Ringelstein ran unopposed for the Democratic nomination.[50]

The election was conducted with ranked choice voting, as opposed to "First-past-the-post voting", after Maine voters passed a citizen referendum approving the change in 2016[51] and a June 2018 referendum sustaining the change.[52]

King was easily re-elected with over 50% of the vote.

Maine Democratic primary
Party Candidate Votes %
Democratic Zak Ringelstein 89,841 100.00
Total votes 89,841 100.00
Maine Republican primary
Party Candidate Votes %
Republican Eric Brakey 59,853 100.00
Total votes 59,853 100.00
Maine general election[32]
Party Candidate Votes % ±%
Independent Angus King (incumbent) 344,575 54.31% +1.42
Republican Eric Brakey 223,502 35.23% +4.48
Democratic Zak Ringelstein 66,268 10.45% –2.81
Write-in 64 0.01% N/A
Total votes 634,409 100.00%
Independent hold

Maryland

Maryland election

Turnout58.17%
 
Nominee Ben Cardin Tony Campbell
Party Democratic Republican
Popular vote 1,491,614 697,107
Percentage 64.86% 30.31%

County results

U.S. senator before election

Ben Cardin
Democratic

Elected U.S. senator

Ben Cardin
Democratic

Two-term Democrat Ben Cardin was re-elected with 56% of the vote in 2012. He won the Democratic primary.[53]

Tony Campbell, Evan Cronhardt, Nnabu Eze, Gerald Smith, and Blaine Taylor[54] were seeking the Republican nomination, with Campbell winning.

Arvin Vohra, vice chairman of the Libertarian National Committee, sought the Libertarian Party nomination.[54]

Independents Neal Simon[54] and Edward Shlikas, and Michael B Puskar ran.

Cardin won re-election to a third term in office.[55]

Maryland Democratic primary
Party Candidate Votes %
Democratic Ben Cardin (incumbent) 477,441 80.28
Democratic Chelsea Manning 34,611 5.82
Democratic Jerome Segal 20,027 3.37
Democratic Debbie Wilson 18,953 3.19
Democratic Marcia H. Morgan 16,047 2.70
Democratic Lih Young 9,874 1.66
Democratic Richard Vaughn 9,480 1.59
Democratic Erik Jetmir 8,259 1.39
Total votes 594,692 100.00
Maryland Republican primary
Party Candidate Votes %
Republican Tony Campbell 51,426 29.22
Republican Chris Chaffee 42,328 24.05
Republican Christina J. Grigorian 30,756 17.48
Republican John Graziani 15,435 8.77
Republican Blaine Taylor 8,848 5.03
Republican Gerald I. Smith Jr. 7,564 4.30
Republican Brian Charles Vaeth 5,411 3.07
Republican Evan M. Cronhardt 4,445 2.53
Republican Bill Krehnbrink 3,606 2.05
Republican Nnabu Eze 3,442 1.96
Republican Albert Binyahmin Howard 2,720 1.55
Total votes 175,981 100.00
Maryland general election[32]
Party Candidate Votes % ±%
Democratic Ben Cardin (incumbent) 1,491,614 64.86% +8.88
Republican Tony Campbell 697,017 30.31% +3.98
Independent Neal Simon 85,964 3.74% N/A
Libertarian Arvin Vohra 22,943 1.00% –0.22
Write-in 2,351 0.10% ±0.00
Total votes 2,299,889 100.00%
Democratic hold

Massachusetts

Massachusetts election

Turnout59.17%
 
Nominee Elizabeth Warren Geoff Diehl
Party Democratic Republican
Popular vote 1,633,371 979,210
Percentage 60.34% 36.17%

Municipal results

U.S. senator before election

Elizabeth Warren
Democratic

Elected U.S. senator

Elizabeth Warren
Democratic

One-term Democrat Elizabeth Warren was elected with 54% of the vote in 2012. She ran for re-election.[56]

State Representative Geoff Diehl,[57] attorney and founder of Better for America, John Kingston[57] and former Romney aide Beth Lindstrom,[57] ran for the Republican nomination. Diehl won the Republican nomination.

Shiva Ayyadurai[58] ran as an independent. Shiva started as in early 2017 as the first Republican in the race, but went independent in November 2017.

Warren defeated Diehl, winning a second term.[59]

Massachusetts Democratic primary
Party Candidate Votes %
Democratic Elizabeth Warren (incumbent) 590,835 98.08
Write-in 11,558 1.92
Total votes 602,393 100.00
Massachusetts Republican primary
Party Candidate Votes %
Republican Geoff Diehl 144,043 55.15
Republican John Kingston III 69,636 26.66
Republican Beth Joyce Lindstrom 46,693 17.88
Write-in 798 0.31
Total votes 261,170 100.00
Massachusetts general election[32]
Party Candidate Votes % ±%
Democratic Elizabeth Warren (incumbent) 1,633,371 60.34% +6.60
Republican Geoff Diehl 979,210 36.17% –10.02
Independent Shiva Ayyadurai 91,710 3.39% N/A
Write-in 2,799 0.10% +0.03
Total votes 2,707,090 100.00%
Democratic hold

Michigan

Michigan election

Turnout56.72%
 
Nominee Debbie Stabenow John James
Party Democratic Republican
Popular vote 2,214,478 1,938,818
Percentage 52.26% 45.76%

County results

U.S. senator before election

Debbie Stabenow
Democratic

Elected U.S. senator

Debbie Stabenow
Democratic

Three-term Democrat Debbie Stabenow was re-elected with 59% of the vote in 2012.[60] She was renominated without Democratic opposition. On the Republican side, businessman John James won the nomination.[60]

In the final months of the election, polls showed the race was beginning to narrow. Ultimately, Stabenow was re-elected, defeating James, with a majority of the vote.

Michigan Democratic primary
Party Candidate Votes %
Democratic Debbie Stabenow (incumbent) 1,045,450 100.00
Total votes 1,045,450 100.00
Michigan Republican primary
Party Candidate Votes %
Republican John James 518,564 54.67
Republican Sandy Pensler 429,885 45.32
Write-in 57 0.01
Total votes 948,506 100.00
Michigan general election[32]
Party Candidate Votes % ±%
Democratic Debbie Stabenow (incumbent) 2,214,478 52.26% –6.54
Republican John James 1,938,818 45.76% +7.78
Green Marcia Squier 40,204 0.95% +0.35
Constitution George Huffman III 27,251 0.64% +0.08
Natural Law John Howard Wilhelm 16,502 0.39% +0.15
Write-in 18 0.00% ±0.00
Total votes 4,237,271 100.00%
Democratic hold

Minnesota

Minnesota (regular)

Minnesota general election

Turnout63.89%
 
Nominee Amy Klobuchar Jim Newberger
Party Democratic (DFL) Republican
Popular vote 1,566,174 940,437
Percentage 60.31% 36.21%

County results

U.S. senator before election

Amy Klobuchar
Democratic (DFL)

Elected U.S. senator

Amy Klobuchar
Democratic (DFL)

Two-term Democrat Amy Klobuchar was re-elected with 65% of the vote in 2012. She ran for re-election.[61]

State Representative Jim Newberger[61] ran for the Republican nomination.

Klobuchar was easily re-elected.[62]

Minnesota Democratic (DFL) primary
Party Candidate Votes %
Democratic (DFL) Amy Klobuchar (incumbent) 557,306 95.70
Democratic (DFL) Steve Carlson 9,934 1.71
Democratic (DFL) Stephen A. Emery 7,047 1.21
Democratic (DFL) David Robert Groves 4,511 0.77
Democratic (DFL) Leonard J. Richards 3,552 0.61
Total votes 582,350 100.00
Minnesota Republican primary
Party Candidate Votes %
Republican Jim Newberger 201,531 69.50
Republican Merrill Anderson 45,492 15.69
Republican Rae Hart Anderon 25,883 8.93
Republican Rocky De La Fuente 17,051 5.88
Total votes 289,957 100.00
Minnesota general election[32]
Party Candidate Votes % ±%
Democratic (DFL) Amy Klobuchar (incumbent) 1,566,174 60.31% –4.92
Republican Jim Newberger 940,437 36.21% +5.68
Legal Marijuana Now Dennis Schuller 66,236 2.55% N/A
Green Paula M. Overby 23,101 0.89% N/A
Write-in 931 0.04% –0.05
Total votes 2,596,879 100.00%
Democratic (DFL) hold

Minnesota (special)

Minnesota special election

Turnout63.66%
 
Nominee Tina Smith Karin Housley
Party Democratic (DFL) Republican
Popular vote 1,370,540 1,095,777
Percentage 52.97% 42.35%

County results

U.S. senator before election

Tina Smith
Democratic (DFL)

Elected U.S. senator

Tina Smith
Democratic (DFL)

Two-term Democrat Al Franken announced that he would resign in December 2017, following allegations of sexual harassment. Mark Dayton, Governor of Minnesota, appointed Lt. Gov. Tina Smith on January 2, 2018, as an interim Senator until the November 2018 election. She defeated primary challenger Richard Painter in the Democratic primary held on August 14.

Incumbent Tina Smith defeated Republican Karin Housley in the general election to finish the term ending January 3, 2021.

Minnesota Democratic (DFL) primary
Party Candidate Votes %
Democratic (DFL) Tina Smith (incumbent) 433,705 76.06
Democratic (DFL) Richard Painter 78,193 13.71
Democratic (DFL) Ali Chehem Ali 18,897 3.31
Democratic (DFL) Gregg A. Iverson 17,825 3.13
Democratic (DFL) Nick Leonard 16,529 2.90
Democratic (DFL) Christopher Lovell Seymore Sr. 5,041 0.88
Total votes 570,190 100.00
Minnesota Republican primary
Party Candidate Votes %
Republican Karin Housley 186,384 61.95
Republican Bob Anderson 107,102 35.60
Republican Nikolay Nikolayevich Bey 7,375 2.45
Total votes 300,861 100.00
Minnesota special election[32]
Party Candidate Votes % ±%
Democratic (DFL) Tina Smith (incumbent) 1,370,540 52.97% –0.18
Republican Karin Housley 1,095,777 42.35% –0.56
Legal Marijuana Now Sarah Wellington 95,614 3.70% N/A
Independent Jerry Trooien 24,324 0.94% N/A
Write-in 1,101 0.04% ±0.00
Total votes 2,587,356 100.00%
Democratic (DFL) hold

Mississippi

Mississippi (regular)

Mississippi general election

Turnout49.66%
 
Nominee Roger Wicker David Baria
Party Republican Democratic
Popular vote 547,619 369,567
Percentage 58.49% 39.47%

County results

U.S. senator before election

Roger Wicker
Republican

Elected U.S. senator

Roger Wicker
Republican

One-term Republican Roger Wicker won re-election with 57% of the vote in 2012. He was appointed in 2007 and won a special election in 2008 to serve the remainder of Trent Lott's term.[29]

David Baria[29] won the Democratic nomination in a run-off on June 26.

Wicker was easily re-elected.[63]

Mississippi Republican primary
Party Candidate Votes %
Republican Roger Wicker (incumbent) 130,118 82.79
Republican Richard Boyanton 27,052 17.21
Total votes 157,170 100.00
Mississippi Democratic primary
Party Candidate Votes %
Democratic Howard Sherman 27,957 31.79
Democratic David Baria 27,244 30.98
Democratic Omeria Scott 21,278 24.20
Democratic Victor G. Maurice Jr. 4,361 4.96
Democratic Jerome Garland 4,266 4.85
Democratic Jensen Bohren 2,825 3.21
Total votes 87,931 100.00
Mississippi Democratic primary runoff
Party Candidate Votes %
Democratic David Baria 44,156 58.64
Democratic Howard Sherman 31,149 41.36
Total votes 75,305 100.00
Mississippi general election[32]
Party Candidate Votes % ±%
Republican Roger Wicker (incumbent) 547,619 58.49% +1.33
Democratic David Baria 369,567 39.47% –1.08
Libertarian Danny Bedwell 12,981 1.39% N/A
Reform Shawn O'Hara 6,048 0.65% –0.58
Total votes 936,215 100.00%
Republican hold

Mississippi (special)

2018 United States Senate special election in Mississippi

November 6, 2018 (first round)
November 27, 2018 (runoff)
Turnout48.14%
 
Candidate Cindy Hyde-Smith Mike Espy Chris McDaniel
Party Republican Democratic Republican
First round 389,995
41.2%
386,742
40.9%
154,878
16.4%
Runoff 486,769
53.6%
420,819
46.4%
Eliminated


U.S. senator before election

Cindy Hyde-Smith
Republican

Elected U.S. Senator

Cindy Hyde-Smith
Republican

Seven-term Republican Thad Cochran, who won re-election with 59.9% of the vote in 2014, announced that he would resign since April 1, 2018 due to health reasons.[64] Phil Bryant, Governor of Mississippi, announced on March 21, 2018, that he would appoint Mississippi Agriculture Commissioner Cindy Hyde-Smith to fill the vacancy.[65] She ran in the special election.[29]

On November 6, a nonpartisan jungle primary took place on the same day as the regularly scheduled U.S. Senate election for the seat currently held by Roger Wicker. Party affiliations were not printed on the ballot.[66] As no candidate gained 50% of the votes, a runoff special election between the top two candidates - Hyde-Smith and former United States Secretary of Agriculture Mike Espy[29] - was held on November 27, 2018. Hyde-Smith won the runoff election.

Democrat Tobey Bartee[67] and Republican Chris McDaniel also contested the first round of the election.[29]

Mississippi special election
Party Candidate Votes %
Nonpartisan Cindy Hyde-Smith (incumbent) 389,995 41.25
Nonpartisan Mike Espy 386,742 40.90
Nonpartisan Chris McDaniel 154,878 16.38
Nonpartisan Tobey Bernard Bartee 13,852 1.47
Total votes 945,467 100.00
Mississippi special election runoff[32]
Party Candidate Votes % ±%
Nonpartisan Cindy Hyde-Smith (incumbent) 486,769 53.63% –6.27
Nonpartisan Mike Espy 420,819 46.37% +8.48
Total votes 907,588 100.00%
Republican hold

Missouri

Missouri election

Turnout58.23%
 
Nominee Josh Hawley Claire McCaskill
Party Republican Democratic
Popular vote 1,254,927 1,112,935
Percentage 51.38% 45.57%

County results

U.S. senator before election

Claire McCaskill
Democratic

Elected U.S. senator

Josh Hawley
Republican

Two-term Democrat Claire McCaskill was re-elected with 55% of the vote in 2012. She was renominated.[68]

Attorney General Josh Hawley[68] won the Republican nomination.[69] Japheth Campbell declared his candidacy for the Libertarian nomination.[68]

Polls showed a close race for months leading up to the election. Hawley defeated McCaskill in the general election.[70]

Missouri Democratic primary
Party Candidate Votes %
Democratic Claire McCaskill (incumbent) 501,872 82.60
Democratic Carla Wright 41,126 6.77
Democratic David Faust 15,984 2.63
Democratic John Hogan 15,958 2.63
Democratic Angelica Earl 15,500 2.55
Democratic Travis Gonzalez 9,480 1.56
Democratic Leonard Joseph Steinman II 7,657 1.26
Total votes 607,577 100.00
Missouri Republican primary
Party Candidate Votes %
Republican Josh Hawley 389,978 58.64
Republican Tony Monetti 64,834 9.75
Republican Austin Petersen 54,916 8.26
Republican Kristi Nichols 49,640 7.47
Republican Christina Smith 35,024 5.27
Republican Ken Patterson 19,579 2.94
Republican Peter Pfeifer 16,594 2.50
Republican Courtland Sykes 13,870 2.09
Republican Fred Ryman 8,781 1.32
Republican Brian G. Hagg 6,871 1.03
Republican Bradley Krembs 4,902 0.74
Total votes 664,889 100.00
Missouri general election[32]
Party Candidate Votes % ±%
Republican Josh Hawley 1,254,927 51.38% +12.27
Democratic Claire McCaskill (incumbent) 1,112,935 45.57% –9.24
Independent Craig O'Dear 34,398 1.41% N/A
Libertarian Japheth Campbell 27,316 1.12% –4.95
Green Jo Crain 12,706 0.52% N/A
Write-in 7 0.00% –0.01
Total votes 2,442,289 100.00%
Republican gain from Democratic

Montana

Montana election

Turnout70.86%
 
Nominee Jon Tester Matt Rosendale
Party Democratic Republican
Popular vote 253,876 235,963
Percentage 50.33% 46.78%

County results

U.S. senator before election

Jon Tester
Democratic

Elected U.S. senator

Jon Tester
Democratic

Two-term Democrat Jon Tester was re-elected with 49% of the vote in 2012. He won the Democratic nomination in the June 5 primary with no opposition.[71]

State Auditor Matthew Rosendale[71] won the Republican nomination in the June 5 primary. State Senator Albert Olszewski,[71] former judge Russell Fagg,[71] and Troy Downing[71] also ran for the Republican nomination.

Tester was re-elected winning over 50% of the vote.[72]

Montana Democratic primary
Party Candidate Votes %
Democratic Jon Tester (incumbent) 114,948 100.00
Write-in 5 0.00
Total votes 114,953 100.00
Montana Republican primary
Party Candidate Votes %
Republican Matt Rosendale 51,859 33.82
Republican Russell Fagg 43,465 28.34
Republican Troy Downing 29,341 19.13
Republican Albert Olszewski 28,681 18.70
Write-in 9 0.01
Total votes 153,355 100.00
Montana general election[32]
Party Candidate Votes % ±%
Democratic Jon Tester (incumbent) 253,876 50.33% +1.75
Republican Matt Rosendale 235,963 46.78% +1.92
Libertarian Rick Breckenridge 14,545 2.88% –3.68
Total votes 504,384 100.00%
Democratic hold

Nebraska

Nebraska election

Turnout57.32%
 
Nominee Deb Fischer Jane Raybould
Party Republican Democratic
Popular vote 403,151 269,917
Percentage 57.69% 38.62%

County results

U.S. senator before election

Deb Fischer
Republican

Elected U.S. senator

Deb Fischer
Republican

One-term Republican Deb Fischer was elected with 58% of the vote in 2012. She ran for and won the Republican nomination in the May 15 primary.[73] Other Republicans who ran include retired professor Jack Heidel, Todd Watson, and Dennis Frank Macek.[74]

Lincoln Councilwoman Jane Raybould ran for and won the Democratic nomination in the May 15 primary.[73] Other Democrats who ran include Frank Svoboda, Chris Janicek, and Larry Marvin, who was a candidate in 2008, 2012, and 2014.[74]

Jim Schultz ran for the Libertarian nomination.[73]

Fischer was easily re-elected.[75]

Nebraska Republican primary
Party Candidate Votes %
Republican Deb Fischer (incumbent) 128,157 75.79
Republican Todd F. Watson 19,661 11.63
Republican Jack Heidel 9,413 5.57
Republican Jeffrey Lynn Stein 6,380 3.77
Republican Dennis Frank Macek 5,483 3.24
Total votes 169,094 100.00
Nebraska Democratic primary
Party Candidate Votes %
Democratic Jane Raybould 59,067 63.68
Democratic Chris Janicek 18,752 20.22
Democratic Frank B. Svoboda 10,548 11.37
Democratic Larry Marvin 4,393 4.74
Total votes 92,760 100.00
Nebraska general election[32]
Party Candidate Votes % ±%
Republican Deb Fischer (incumbent) 403,151 57.69% –0.08
Democratic Jane Raybould 269,917 38.62% –3.61
Libertarian Jim Schultz 25,349 3.63% N/A
Write-in 466 0.07% N/A
Total votes 698,883 100.00%
Republican hold

Nevada

Nevada election

Turnout62.26%
 
Nominee Jacky Rosen Dean Heller
Party Democratic Republican
Popular vote 490,071 441,202
Percentage 50.41% 45.38%

County results

U.S. senator before election

Dean Heller
Republican

Elected U.S. senator

Jacky Rosen
Democratic

Incumbent Republican Dean Heller was the Republican nominee.[76] He was appointed to the seat in 2011 and then elected with 46% of the vote in 2012. Heller considered running for governor, but chose to seek re-election.[77]

Nevada was the only state in the mid-term elections that had an incumbent Republican senator in a state that Hillary Clinton had won in 2016.

Representative Jacky Rosen[77] is the Democratic nominee.[76]

Rosen defeated Heller in the general election, making Heller the only Republican incumbent to lose re-election in 2018.[78]

Nevada Republican primary
Party Candidate Votes %
Republican Dean Heller (incumbent) 99,509 69.97
Republican Tom Heck 26,296 18.49
None of These Candidates 5,978 4.20
Republican Sherry Brooks 5,145 3.62
Republican Sarah Gazala 4,011 2.82
Republican Vic Harrell 1,282 0.90
Total votes 142,221 100.00
Nevada Democratic primary
Party Candidate Votes %
Democratic Jacky Rosen 110,567 77.11
None of These Candidates 10,078 7.03
Democratic David Drew Knight 6,346 4.43
Democratic Allen Rheinhart 4,782 3.33
Democratic Jesse Sbaih 4,540 3.17
Democratic Sujeet Mahendra 3,835 2.67
Democratic Danny Burleigh 3,244 2.26
Total votes 143,392 100.00
Nevada general election[32]
Party Candidate Votes % ±%
Democratic Jacky Rosen 490,071 50.41% +5.70
Republican Dean Heller (incumbent) 441,202 45.38% –0.49
None of These Candidates 15,303 1.57% –2.97
Independent Barry Michaels 9,269 0.95% N/A
Libertarian Tim Hagan 9,196 0.95% N/A
Independent American Kamau A. Bakari 7,091 0.73% –4.16
Total votes 972,132 100.00%
Democratic gain from Republican

New Jersey

New Jersey election

Turnout53.38%
 
Nominee Bob Menendez Bob Hugin
Party Democratic Republican
Popular vote 1,711,654 1,357,355
Percentage 54.01% 42.83%

County results

U.S. senator before election

Bob Menendez
Democratic

Elected U.S. senator

Bob Menendez
Democratic

Republican Bob Hugin[79] was nominated to face two-term Democrat Bob Menendez, who was re-elected with 59% of the vote in 2012. Menendez was originally appointed to the seat in January 2006. He ran for re-election, despite recent scandals that plagued his campaign.[79]

Hugin self-funded most of his campaign. Ultimately, Menendez was re-elected with nearly 54% of the vote.[80]

New Jersey Democratic primary
Party Candidate Votes %
Democratic Bob Menendez (incumbent) 262,477 62.28
Democratic Lisa A. McCormick 158,998 37.72
Total votes 421,475 100.00
New Jersey Republican primary
Party Candidate Votes %
Republican Bob Hugin 168,052 75.13
Republican Brian D. Goldberg 55,624 24.87
Total votes 223,676 100.00
New Jersey general election[32]
Party Candidate Votes % ±%
Democratic Bob Menendez (incumbent) 1,711,654 54.01% –4.86
Republican Bob Hugin 1,357,355 42.83% +3.46
Green Madelyn R. Hoffman 25,150 0.79% +0.32
Libertarian Murray Sabrin 21,212 0.67% +0.17
Independent Natalie Lynn Rivera 19,897 0.63% N/A
Independent Tricia Flanagan 16,101 0.51% N/A
Independent Kevin Kimple 9,087 0.29% N/A
Independent Hank Schroeder 8,854 0.28% N/A
Total votes 3,169,310 100.00%
Democratic hold

New Mexico

New Mexico election

Turnout55.03%
 
Nominee Martin Heinrich Mick Rich Gary Johnson
Party Democratic Republican Libertarian
Popular vote 376,998 212,813 107,201
Percentage 54.09% 30.53% 15.38%

County results

U.S. senator before election

Martin Heinrich
Democratic

Elected U.S. senator

Martin Heinrich
Democratic

One-term Democrat Martin Heinrich was elected with 51% of the vote in 2012. He ran.[81] Mick Rich won the Republican nomination unopposed.[81]

Aubrey Dunn Jr., New Mexico Commissioner of Public Lands and otherwise the first Libertarian to ever hold statewide elected office in history, announced his run for the seat,[81] but stepped aside in August to allow former Governor of New Mexico, Gary Johnson's candidacy.

Heinrich was easily re-elected, defeating Rich and Johnson.

New Mexico Democratic primary
Party Candidate Votes %
Democratic Martin Heinrich (incumbent) 152,145 100.00
Total votes 152,145 100.00
New Mexico Republican primary
Party Candidate Votes %
Republican Mick Rich 67,502 100.00
Total votes 67,502 100.00
New Mexico Libertarian primary
Party Candidate Votes %
Libertarian Aubrey Dunn Jr. 623 100.00
Total votes 623 100.00
New Mexico general election[32]
Party Candidate Votes % ±%
Democratic Martin Heinrich (incumbent) 376,998 54.09% +3.08
Republican Mick Rich 212,813 30.53% –14.75
Libertarian Gary Johnson 107,201 15.38% N/A
Total votes 697,012 100.00%
Democratic hold

New York

New York election

Turnout52.32%
 
Nominee Kirsten Gillibrand Chele Chiavacci Farley
Party Democratic Republican
Popular vote 4,056,931 1,998,220
Percentage 67.00% 33.00%

County results

U.S. senator before election

Kirsten Gillibrand
Democratic

Elected U.S. senator

Kirsten Gillibrand
Democratic

One-term Democrat Kirsten Gillibrand was elected with 72% of the vote in 2012. She had previously been appointed to the seat in 2009 and won a special election to remain in office in 2010. She ran.[82]

Private equity executive Chele Chiavacci Farley has been nominated for U.S. Senate by the Republican and Conservative Parties.[82]

Gillibrand was elected to a second term.[83]

New York general election[32]
Party Candidate Votes % ±%
Democratic Kirsten Gillibrand 3,755,489 61.98% –4.40
Working Families Kirsten Gillibrand 160,128 2.64% –1.12
Independence Kirsten Gillibrand 99,325 1.64% –0.43
Women's Equality Kirsten Gillibrand 41,989 0.69% N/A
Total Kirsten Gillibrand (incumbent) 4,056,931 66.96% –5.25
Republican Chele Farley 1,730,439 28.56% +5.83
Conservative Chele Farley 246,171 4.06% +0.45
Reform Chele Farley 21,610 0.36% N/A
Total Chele Farley 1,998,220 32.98% +6.64
Write-in 3,872 0.06% N/A
Total votes 6,059,023 100.00%
Democratic hold

North Dakota

North Dakota election

Turnout56.27%
 
Nominee Kevin Cramer Heidi Heitkamp
Party Republican Democratic–NPL
Popular vote 179,720 144,376
Percentage 55.45% 44.55%

County results

U.S. senator before election

Heidi Heitkamp
Democratic–NPL

Elected U.S. senator

Kevin Cramer
Republican

One-term Democrat Heidi Heitkamp was elected with 50% of the vote in 2012. She won the Democratic nomination unopposed.[84]

Representative Kevin Cramer[84] won the Republican nomination in the June 12 primary. Former Niagara, North Dakota Mayor Thomas O'Neill[84] also ran for the Republican nomination.

Heitkamp was continuously behind in the polls leading up to the election, and Heitkamp ended up losing to Cramer by 11%.[85]

North Dakota Democratic-NPL primary
Party Candidate Votes %
Democratic–NPL Heidi Heitkamp (incumbent) 36,729 99.58
Write-in 154 0.42
Total votes 36,883 100.00
North Dakota Republican primary
Party Candidate Votes %
Republican Kevin Cramer 61,529 87.73
Republican Thomas O'Neill 8,509 12.13
Write-in 95 0.14
Total votes 70,133 100.00
North Dakota general election[32]
Party Candidate Votes % ±%
Republican Kevin Cramer 179,720 55.11% +5.79
Democratic–NPL Heidi Heitkamp (incumbent) 144,376 44.27% –5.97
Write-in 2,042 0.63% +0.19
Total votes 326,138 100.00%
Republican gain from Democratic–NPL

Ohio

Ohio election

Turnout54.65%
 
Nominee Sherrod Brown Jim Renacci
Party Democratic Republican
Popular vote 2,355,924 2,053,963
Percentage 53.41% 46.59%

County results

U.S. senator before election

Sherrod Brown
Democratic

Elected U.S. senator

Sherrod Brown
Democratic

Two-term Democrat Sherrod Brown was re-elected with 51% of the vote in 2012. He ran and was unopposed in Democratic primary.[86]

U.S. Representative Jim Renacci ran for and won the Republican nomination in the May 8 primary.[86] Other Republicans who ran include investment banker Michael Gibbons,[86] businesswoman Melissa Ackison,[86] Dan Kiley,[86] and Don Elijah Eckhart.[86]

Brown won re-election, defeating Renacci. Brown was the only non-judicial statewide Democrat in Ohio to win in 2018.[87]

Ohio Democratic primary
Party Candidate Votes %
Democratic Sherrod Brown (incumbent) 613,373 100.00
Total votes 613,373 100.00
Ohio Republican primary
Party Candidate Votes %
Republican Jim Renacci 363,622 47.34
Republican Mike Gibbons 243,426 31.69
Republican Melissa Ackison 100,543 13.09
Republican Dan Kiley 30,684 3.99
Republican Don Elijah Eckhart 29,796 3.88
Write-in 78 0.01
Total votes 768,149 100.00
Ohio general election[88]
Party Candidate Votes % ±%
Democratic Sherrod Brown (incumbent) 2,355,924 53.41% +2.70%
Republican Jim Renacci 2,053,963 46.57% +1.87%
Write-in 1,012 0.02% N/A
Total votes 4,410,898 100.00% N/A
Democratic hold

Pennsylvania

Pennsylvania election

Turnout58.18%
 
Nominee Bob Casey Jr. Lou Barletta
Party Democratic Republican
Popular vote 2,792,327 2,134,848
Percentage 55.74% 42.62%

County results

U.S. senator before election

Bob Casey Jr.
Democratic

Elected U.S. senator

Bob Casey Jr.
Democratic

Two-term Democrat Bob Casey Jr. was re-elected with 54% of the vote in 2012. He ran and won the Democratic primary unopposed.[89]

U.S. Representative Lou Barletta ran for and won the Republican nomination in the May 15 primary.[89] Jim Christiana also ran for the Republican nomination.[89]

Casey was easily re-elected.[90]

Pennsylvania Democratic primary
Party Candidate Votes %
Democratic Bob Casey Jr. (incumbent) 752,008 99.13
Write-in 6,584 0.87
Total votes 758,592 100.00
Pennsylvania Republican primary
Party Candidate Votes %
Republican Lou Barletta 433,312 62.80
Republican Jim Christiana 254,118 36.83
Write-in 2,553 0.37
Total votes 689,983 100.00
Pennsylvania general election[32]
Party Candidate Votes % ±%
Democratic Bob Casey Jr. (incumbent) 2,792,437 55.73% +2.04
Republican Lou Barletta 2,134,848 42.60% –1.99
Libertarian Dale Kerns 50,907 1.02% –0.70
Green Neal Gale 31,208 0.62% N/A
Write-in 1,568 0.03% N/A
Total votes 5,010,968 100.00%
Democratic hold

Rhode Island

Rhode Island election

Turnout47.69%
 
Nominee Sheldon Whitehouse Robert Flanders
Party Democratic Republican
Popular vote 231,477 144,421
Percentage 61.44% 38.33%

Municipal results

U.S. senator before election

Sheldon Whitehouse
Democratic

Elected U.S. senator

Sheldon Whitehouse
Democratic

Two-term Democrat Sheldon Whitehouse was re-elected with 64% of the vote in 2012. He ran.[91]

Former Rhode Island Supreme Court Associate Justice Robert Flanders[91] was the Republican nominee.

Whitehouse was elected to a third term by a wide margin.

Rhode Island Democratic primary
Party Candidate Votes %
Democratic Sheldon Whitehouse (incumbent) 89,140 76.79
Democratic Patricia Fontes 26,947 23.21
Total votes 116,087 100.00
Rhode Island Republican primary
Party Candidate Votes %
Republican Robert Flanders 26,543 87.70
Republican Rocky De La Fuente 3,722 12.30
Total votes 30,265 100.00
Rhode Island general election[32]
Party Candidate Votes % ±%
Democratic Sheldon Whitehouse (incumbent) 231,477 61.44% –3.37
Republican Robert Flanders 144,421 38.33% +3.36
Write-in 840 0.22% ±0.00
Total votes 376,738 100.00%
Democratic hold

Tennessee

Tennessee election

November 6, 2018
Turnout54.46% Decrease[92] 7.4 pp
 
Nominee Marsha Blackburn Phil Bredesen
Party Republican Democratic
Popular vote 1,227,483 985,450
Percentage 54.71% 43.92%

Blackburn:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
Bredesen:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
Tie:      50%
     No data

U.S. senator before election

Bob Corker
Republican

Elected U.S. Senator

Marsha Blackburn
Republican

Two-term Republican Bob Corker was re-elected with 65% of the vote in 2012. Senator Corker filed his Statement of Candidacy with the Secretary of the U.S. Senate to run for re-election,[93] but on September 26, 2017, Senator Corker announced his intent to retire.[94]

Aaron Pettigrew[95] and Republican U.S. Representative Marsha Blackburn[95] ran for the Republican nomination. Marsha Blackburn became the Republican nominee.

Former Tennessee Governor Phil Bredesen[95] became the Democratic nominee.

Tennessee Republican primary
Party Candidate Votes %
Republican Marsha Blackburn 613,513 84.48
Republican Aaron Pettigrew 112,705 15.52
Write-in 13 0.00
Total votes 726,231 100.00
Tennessee Democratic primary
Party Candidate Votes %
Democratic Phil Bredesen 349,718 91.51
Democratic Gary Davis 20,170 5.28
Democratic John Wolfe Jr. 12,269 3.21
Total votes 382,157 100.00
Tennessee general election[96]
Party Candidate Votes % ±%
Republican Marsha Blackburn 1,227,483 54.71% -10.18%
Democratic Phil Bredesen 985,450 43.92% +13.51%
Independent Trudy Austin 9,455 0.42% N/A
Independent Dean Hill 8,717 0.39% N/A
Independent Kris L. Todd 5,084 0.23% N/A
Independent John Carico 3,398 0.15% N/A
Independent Breton Phillips 2,226 0.10% N/A
Independent Kevin Lee McCants 1,927 0.09% N/A
Total votes 2,243,740 100.00% N/A
Republican hold

Texas

Texas election

November 6, 2018
Turnout53.01% (of registered voters)
42.07% (of voting age population)[97]
 
Nominee Ted Cruz Beto O'Rourke
Party Republican Democratic
Popular vote 4,260,553 4,045,632
Percentage 50.89% 48.33%

Cruz:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
O'Rourke:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
     No data

U.S. senator before election

Ted Cruz
Republican

Elected U.S. Senator

Ted Cruz
Republican

One-term Republican Ted Cruz was elected with 57% of the vote in 2012. He overwhelmingly won the Republican primary on March 6, 2018.[98] Television producer Bruce Jacobson,[99] Houston energy attorney Stefano de Stefano,[100] former mayor of La Marque Geraldine Sam,[101] Mary Miller,[102] and Thomas Dillingham[103] were Cruz's opponents.

U.S. Representative Beto O'Rourke won the Democratic nomination on March 6, 2018.[98] Other Democrats who ran include Irasema Ramirez Hernandez[104] and Edward Kimbrough.[105]

Nurse Carl Bible ran as an independent.[106] Bob McNeil ran as the candidate of the American Citizen Party.[107] Neal Dikeman was the Libertarian nominee.[108]

O'Rourke ran a strong campaign, creating a close race in what has traditionally been a Republican stronghold.[109] Nevertheless, Cruz was narrowly re-elected to a second term.[110]

Texas Republican primary
Party Candidate Votes %
Republican Ted Cruz (incumbent) 1,322,724 85.36
Republican Mary Miller 94,715 6.11
Republican Bruce Jacobson Jr. 64,791 4.18
Republican Stefano de Stefano 44,456 2.87
Republican Geraldine Sam 22,887 1.48
Total votes 1,549,573 100.00
Texas Democratic primary
Party Candidate Votes %
Democratic Beto O'Rourke 644,632 61.81
Democratic Sema Hernandez 247,424 23.72
Democratic Edward Kimbrough 150,858 14.47
Total votes 1,042,914 100.00
Texas general election[32]
Party Candidate Votes % ±%
Republican Ted Cruz (incumbent) 4,260,553 50.89% –5.57
Democratic Beto O'Rourke 4,045,632 48.33% +7.71
Libertarian Neal Dikeman 65,470 0.78% –1.28
Total votes 8,371,655 100.00%
Republican hold

Utah

Utah election

Turnout74.15%
 
Nominee Mitt Romney Jenny Wilson
Party Republican Democratic
Popular vote 665,215 328,541
Percentage 62.59% 30.91%

County results

U.S. senator before election

Orrin Hatch
Republican

Elected U.S. senator

Mitt Romney
Republican

Seven-term Republican Orrin Hatch was re-elected with 65% of the vote in 2012. Hatch was the President pro tempore of the United States Senate, as well as the second most-senior Senator. Before the 2012 election, Hatch said that he would retire at the end of his seventh term if he was re-elected.[111] Hatch initially announced his re-election campaign on March 9, 2017,[112][113] but later announced his plans to retire on January 2, 2018. Former 2012 Republican presidential nominee Mitt Romney was running for the seat.[114]

Professor James Singer was running for the Democratic nomination, but he dropped out and endorsed Salt Lake County Councilwoman Jenny Wilson, who made her Senate bid official on July 17, 2017.[115][116] Danny Drew[117][118] also was running, but dropped out and endorsed Jenny Wilson. Mitchell Kent Vice was defeated for the Democratic nomination by Wilson.

Mitt Romney was easily elected, defeating Wilson.[119]

Utah Republican primary
Party Candidate Votes %
Republican Mitt Romney 240,021 71.27
Republican Mike Kennedy 96,771 28.73
Total votes 336,792 100.00
Utah general election[32]
Party Candidate Votes % ±%
Republican Mitt Romney 665,215 62.59% –2.72
Democratic Jenny Wilson 328,541 30.91% +0.93
Constitution Tim Aalders 28,774 2.71% –0.46
Libertarian Craig Bowden 27,607 2.60% N/A
Independent American Reed McCandless 12,708 1.20% N/A
Write-in 52 0.00% ±0.00
Total votes 1,062,897 100.00%
Republican hold

Vermont

Vermont election

Turnout55.57%
 
Nominee Bernie Sanders Lawrence Zupan
Party Independent Republican
Popular vote 183,649 74,815
Percentage 67.44% 27.47%

County results

U.S. senator before election

Bernie Sanders
Independent

Elected U.S. senator

Bernie Sanders
Independent

Two-term Independent Senator Bernie Sanders was re-elected with 71% of the vote in 2012. Sanders, one of two independent members of Congress, has caucused with the Democratic Party since taking office in 2007. In November 2015, Sanders announced his plans to run as a Democrat, rather than an independent, in all future elections. He won the nomination easily.[120]

Sanders easily won election to a third term.[121]

Vermont Democratic primary
Party Candidate Votes %
Democratic Bernie Sanders (incumbent) 63,683 94.02
Democratic Folsade Adeluola 3,766 5.56
Write-in 281 0.41
Total votes 67,730 100.00
Vermont Republican primary
Party Candidate Votes %
Republican H. Brooke Paige 9,805 37.37
Republican Lawrence Zupan 9,383 35.86
Republican Jasdeep Pannu 4,527 17.30
Write-in Bernie Sanders (incumbent) 1,081 4.13
Republican Rocky De La Fuente 1,057 4.04
Write-in 314 1.20
Total votes 26,167 100.00
Vermont general election[32]
Party Candidate Votes % ±%
Independent Bernie Sanders (incumbent) 183,649 67.36% –3.64
Republican Lawrence Zupan 74,815 27.44% +2.54
Independent Brad Peacock 3,665 1.34% N/A
Independent Russell Beste 2,763 1.01% N/A
Independent Edward Gilbert Jr. 2,244 0.82% N/A
Independent Folasade Adeluola 1,979 0.73% N/A
Liberty Union Reid Kane 1,171 0.43% –0.43
Independent Jon Svitavsky 1,130 0.41% N/A
Independent Bruce Busa 914 0.34% N/A
Write-in 294 0.11% +0.03
Total votes 272,624 100.00%
Independent hold

Virginia

Virginia election

Turnout59.14%
 
Nominee Tim Kaine Corey Stewart
Party Democratic Republican
Popular vote 1,910,370 1,374,313
Percentage 57.00% 41.00%

County results

U.S. senator before election

Tim Kaine
Democratic

Elected U.S. senator

Tim Kaine
Democratic

One-term Democrat Tim Kaine was elected with 53% of the vote in 2012. He was re-nominated unopposed.[122] Prince William County Supervisor Corey Stewart[122] was the Republican nominee. Matt Waters was the Libertarian nominee.[123] Kaine defeated Stewart with 57% of the vote. Stewart received 41% of the vote.[124]

Virginia Republican primary
Party Candidate Votes %
Republican Corey Stewart 136,610 44.86
Republican Nick Freitas 131,321 43.12
Republican E. W. Jackson 36,508 11.99
Write-in 79 0.03
Total votes 304,518 100.00
Virginia general election[32]
Party Candidate Votes % ±%
Democratic Tim Kaine (incumbent) 1,910,370 57.00% +4.17
Republican Corey Stewart 1,374,313 41.00% –5.92
Libertarian Matt Waters 61,565 1.84% N/A
Write-in 5,509 0.16% –0.09
Total votes 3,351,757 100.00%
Democratic hold

Washington

Washington election

Turnout70.74%
 
Nominee Maria Cantwell Susan Hutchison
Party Democratic Republican
Popular vote 1,803,364 1,282,804
Percentage 58.3% 41.5%

County results

U.S. senator before election

Maria Cantwell
Democratic

Elected U.S. senator

Maria Cantwell
Democratic

Three-term Democrat Maria Cantwell was re-elected with 61% of the vote in 2012. She ran.[125]

Washington holds non-partisan blanket primaries, in which the top two finishers advance to the general election regardless of party. Cantwell and former state Republican Party chair Susan Hutchison faced each other in November.

Cantwell won re-election by a large margin.[126]

Washington blanket primary
Party Candidate Votes %
Democratic Maria Cantwell (incumbent) 929,961 54.68
Republican Susan Hutchison 413,317 24.30
Republican Keith Swank 39,818 2.34
Republican Joey Gibson 38,676 2.27
Democratic Clint Tannehill 35,770 2.10
Republican Dave Bryant 33,962 2.00
Republican Art Coday 30,654 1.80
Independent Jennifer Ferguson 25,224 1.48
Republican Tim Owen 23,167 1.36
Republican Matt Hawkins 13,324 0.78
Democratic Don Rivers 12,634 0.74
Libertarian Mike Luke 12,302 0.72
Republican Glen Stockwell 11,611 0.68
Independent Thor Amundson 9,393 0.55
Democratic Mohammad Said 8,649 0.51
Republican Matthew Heines 7,737 0.45
Freedom Socialist Steve Hoffman 7,390 0.43
Republican Goodspaceguy 7,057 0.41
Republican John Orlinski 6,905 0.41
Independent Dave Strider 6,821 0.40
Republican Rocky De La Fuente 5,724 0.34
Green James Robert Deal 3,849 0.23
Independent Sam Wright 3,761 0.22
Independent Brad Chase 2,655 0.16
Democratic George Kalberer 2,448 0.14
Independent Charlie Jackson 2,411 0.14
Republican RC Smith 2,238 0.13
Independent Jon Butler 2,016 0.12
Independent Alex Tsimerman 1,366 0.08
Total votes 1,700,840 100.00
Washington general election[32]
Party Candidate Votes % ±%
Democratic Maria Cantwell (incumbent) 1,803,364 58.31% –2.05
Republican Susan Hutchison 1,282,804 41.48% +1.99
Write-in 6,461 0.21% +0.06
Total votes 3,092,629 100.00%
Democratic hold

West Virginia

West Virginia election

Turnout47.04%
 
Nominee Joe Manchin Patrick Morrisey
Party Democratic Republican
Popular vote 290,510 271,113
Percentage 49.57% 46.26%

County results

U.S. senator before election

Joe Manchin
Democratic

Elected U.S. senator

Joe Manchin
Democratic

One-term Democrat Joe Manchin was elected with 61% of the vote in 2012. He originally won the seat in a 2010 special election. Manchin ran for re-election and won the May 8 Democratic primary.[127] Environmental activist Paula Jean Swearengin,[127] also ran for the Democratic nomination.

West Virginia Attorney General Patrick Morrisey received the Republican nomination in the May 8 primary. Representative Evan Jenkins,[127] coal miner Bo Copley,[127] Jack Newbrough, Don Blankenship, and Tom Willis ran for the Republican nomination.[127]

Despite recent Republican successes in West Virginia, Manchin was able to win re-election to a second term.[128]

West Virginia Democratic primary
Party Candidate Votes %
Democratic Joe Manchin (incumbent) 112,658 69.86
Democratic Paula Jean Swearengin 48,594 30.14
Total votes 161,252 100.00
West Virginia Republican primary
Party Candidate Votes %
Republican Patrick Morrisey 48,007 34.90
Republican Evan Jenkins 40,185 29.21
Republican Don Blankenship 27,478 19.97
Republican Tom Willis 13,540 9.84
Republican Bo Copley 4,248 3.09
Republican Jack Newbrough 4,115 2.99
Total votes 137,573 100.00
West Virginia general election[32]
Party Candidate Votes % ±%
Democratic Joe Manchin (incumbent) 290,510 49.57% –11.00
Republican Patrick Morrisey 271,113 46.26% +9.79
Libertarian Rusty Hollen 24,411 4.17% N/A
Total votes 586,034 100.00%
Democratic hold

Wisconsin

Wisconsin election

Turnout81.81%
 
Nominee Tammy Baldwin Leah Vukmir
Party Democratic Republican
Popular vote 1,472,914 1,184,885
Percentage 55.36% 44.53%

County results

U.S. senator before election

Tammy Baldwin
Democratic

Elected U.S. senator

Tammy Baldwin
Democratic

One-term Democrat Tammy Baldwin was elected with 51% of the vote in 2012. She ran.[129]

State Senator Leah Vukmir[129] and businessman and member of Wisconsin Board of Veterans Affairs Kevin Nicholson[129] ran for the Republican nomination, with Vukmir proceeding to the general election.

Baldwin was re-elected with over 55% of the vote.[130]

Wisconsin Democratic primary
Party Candidate Votes %
Democratic Tammy Baldwin (incumbent) 510,812 99.64
Write-in 1,848 0.36
Total votes 512,660 100.00
Wisconsin Republican primary
Party Candidate Votes %
Republican Leah Vukmir 217,230 48.90
Republican Kevin Nicholson 191,276 43.06
Republican George Lucia 18,786 4.23
Republican Griffin Jones 8,699 1.96
Republican Charles Barman 7,959 1.79
Write-in 303 0.07
Total votes 444,253 100.00
Wisconsin general election[32]
Party Candidate Votes % ±%
Democratic Tammy Baldwin (incumbent) 1,472,914 55.36% +3.95
Republican Leah Vukmir 1,184,885 44.53% –1.33
Write-in 2,964 0.11% ±0.00
Total votes 2,660,763 100.00%
Democratic hold

Wyoming

Wyoming election

Turnout77.43%
 
Nominee John Barrasso Gary Trauner
Party Republican Democratic
Popular vote 136,210 61,227
Percentage 66.96% 30.10%

County results

U.S. senator before election

John Barrasso
Republican

Elected U.S. senator

John Barrasso
Republican

One-term Republican John Barrasso was elected with 76% of the vote in 2012. Barrasso was appointed to the seat in 2007 and won a special election in 2008. He ran.[131]

Gary Trauner,[131] a Jackson Hole businessman and U.S. House candidate in 2006 and 2008, was the Democratic nominee.

Barrasso was easily elected to a second term, defeating Trauner.[132]

Wyoming Republican primary
Party Candidate Votes %
Republican John Barrasso (incumbent) 74,292 64.76
Republican Dave Dodson 32,647 28.46
Republican John Holtz 2,981 2.60
Republican Charlie Hardy 2,377 2.07
Republican Rocky De La Fuente 1,280 1.12
Republican Anthony Van Risseghem 870 0.76
Write-in 267 0.23
Total votes 114,714 100.00
Wyoming Democratic primary
Party Candidate Votes %
Democratic Gary Trauner 17,562 98.90
Write-in 195 1.10
Total votes 17,757 100.00
Wyoming general election[32]
Party Candidate Votes % ±%
Republican John Barrasso (incumbent) 136,210 66.96% –8.70
Democratic Gary Trauner 61,227 30.10% +8.45
Libertarian Joseph Porambo 5,658 2.78% N/A
Write-in 325 0.16% –0.01
Total votes 203,420 100.00%
Republican hold

See also

Notes

  1. Total of official results for Democratic candidates.
  2. Both general election candidates in California were members of the Democratic Party, having won the top 2 positions in the nonpartisan blanket primary (established by the 2010 California Proposition 14), so all 11.1 million votes in California were counted for Democrats, as tabulated by the Clerk of the House.[1][2] In 2012, the last time a Republican candidate for the U.S. Senate appeared on the ballot in California, 12.6 million votes were cast, of which 4.7 million, or 38%, were cast for the Republican candidate.
  3. Both independent senators — Angus King and Bernie Sanders — have caucused with the Democratic Party since joining the Senate.
  4. Total of official results for candidates labeled "Independent".
  5. 1 2 Appointee elected
  6. The last elections for this group of senators were in 2012, except for those who were appointed after the resignation or passing of a sitting senator, as noted.
  7. The Fox News Midterm Power Rankings uniquely does not contain a category for Safe/Solid races
  8. Reflects the classic version of the forecast model.
  9. Democrat Al Franken won with 53.2% of the vote in 2014, but resigned on January 2, 2018.
  10. Special elections in Mississippi are nonpartisan, therefore party affiliation is not listed on the ballot.
  11. Republican Thad Cochran won with 59.9% of the vote in 2014, but resigned on April 1, 2018 due to declining health.
  12. Democratic total includes 2 Independents who caucus with the Democrats
  13. Mississippi held a run-off for the special election on November 27, 2018 because no candidate won a majority of the vote in the November 6, 2018 jungle primary.
  14. Indiana was the "tipping point" state.
  15. Under California's "jungle primary" system, the general election was between two Democrats.

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