Senate debate

The Senate considered the amendment on August 22, 1978.^[4] It had considerable bipartisan support, with both Majority Leader Robert Byrd (D–WV) and Minority Leader Howard Baker (R–TN) pressing for its passage. Debate centered on the Founding Fathers' original intentions for the capital city, the morality of denying 700,000 American citizens congressional representation, and the constitutionality of the proposal.

Support for the amendment came from across the political spectrum, though liberal Democrats were its most visible defenders. Democrat Patrick Leahy of Vermont rebutted arguments from conservatives that extending full voting rights to D.C. was unfair to rural states. Citing his state's rural nature, Leahy asserted that the proposal was not "a case of rural versus urban," but rather about "simple justice, overdue justice." Alaska Democrat Mike Gravel argued that the principles of democracy triumph over policies, expressing his support for the proposal despite the likelihood of the District's representatives "voting against the Alaskan position on d-2 land" and encouraging "more government rather than more implementation through the private sector."

Several Republicans also spoke out in support. Michigan's Robert P. Griffin noted the United States' unusual treatment of D.C., stating, "In only one other country in the world—Brazil—are residents of the capital city denied representation in their national legislature." Edward Brooke of Massachusetts brought up his Washington upbringing in expressing his support for the amendment, while Bob Dole reminded colleagues that the GOP had included full voting representation for the District of Columbia in its party platform adopted at the 1976 Republican National Convention. Lowell Weicker of Connecticut went so far as to argue that the proposed amendment was not enough, instead advocating for the District of Columbia's admission as a state.

One particularly notable supporter of the amendment was Strom Thurmond (R–SC), notorious for his longtime support of racial segregation. Reflecting his gradual shift toward more moderate views on race, he supported the amendment despite the District of Columbia's Black-majority population. Noting the United States' commitment to exemplifying the ideals of democracy, he asked, "How can we do that when three-quarters of a million people are not allowed to have voting representation in the capital city of this Nation?"

Opposition to the amendment, meanwhile, came almost exclusively from conservatives. Ted Stevens (R–AK) was a particularly vocal foe:

"If this area is tired of being the seat of Government, if it does not wish to vote in Maryland and not have the seat of Government moved, I would be happy to suggest the Capitol be moved. We went through it once in the forties. I would be more than happy to go through it again. And I shall propose it next year. Let us move the Capitol. Let us build a Federal City in which nobody lives, in which there are just buildings and the seat of Government. Let us make Washington, D.C., a historical monument, another part of the Park Service, if you will. So many people are interested in making much of my State a national park. I will be delighted to assist in making this a national park so everybody in the world will come and see how we ran the Government of the United States for the first 200 years."

Other opponents of the amendment proposed more serious compromises. Mississippi Democrat John C. Stennis advocated for giving the District only one senator, while Oklahoma's Dewey F. Bartlett tried to alter the amendment to assure that Congress could not exercise committee oversight of D.C. There was considerable discussion of retroceding the District of Columbia back into Maryland, though Senators Charles Mathias and Paul Sarbanes quickly doused the idea.

Orrin Hatch alleged that the proposal contradicted Article V of the United States Constitution, which guarantees that "no State, without its consent, shall be deprived of its equal Suffrage in the Senate." Hatch claimed this meant that all 50 states would have to approve the amendment. In a blistering retort, Ted Kennedy said, "It fails in terms of logic. How can a constitutional amendment be unconstitutional?"

The amendment ultimately passed with the support of 48 Democrats and 19 Republicans. Exactly 80% of the Democratic caucus voted for the amendment, while Republicans split evenly. The chamber's sole independent, Harry F. Byrd Jr. of Virginia, voted nay.

Vote in the legislatures

With that, the District of Columbia Voting Rights Amendment was submitted to the state legislatures for ratification. The Congress, via Section 4, included the requirement that ratification by three-fourths (38) of the states be completed within seven years following its passage by the Congress (i.e., August 22, 1985) in order for the proposed amendment to become part of the Constitution.^[5] By placing the ratification deadline in the text of the proposed amendment the deadline could not be extended without a separate amendment to the Constitution, in contrast to the ratification deadline of the Equal Rights Amendment which was restricted by statute and not the amendment itself.^[6]