The Fastest Constitutional Amendment in U.S. History Was About Vietnam

On 1 July 1971 North Carolina became the 38th state to ratify the 26th Amendment to the United States Constitution, lowering the federal voting age from 21 to 18. Congress had proposed the amendment on 23 March of the same year. The interval — about three months and a week — is the shortest of any constitutional amendment in American history.

The argument the amendment settled was older than the amendment itself. The eighteen-year-old draft, set by Congress in 1942 as the country entered the Second World War, had created a long mismatch: men could be conscripted at 18 and sent to combat, but could not vote until 21. The slogan old enough to fight, old enough to vote dates to a 1942 Senate speech by Arthur Vandenberg. President Eisenhower called for lowering the voting age in his 1954 State of the Union address; nothing happened.

Vietnam revived the issue. By 1969 the war had killed more than 30,000 Americans, of whom roughly one in five was 21 or younger. Anti-war protests on college campuses made the disenfranchisement of those bearing the greatest burden hard to defend. In 1970 Congress tried a statutory shortcut, lowering the voting age in federal elections by ordinary law; the Supreme Court ruled in Oregon v. Mitchell that Congress could only do so for federal contests, not state ones. A constitutional amendment was the only clean path.

State legislatures, watching public opinion polls and the war, ratified at unusual speed. Within a decade the share of Americans aged 18 to 20 actually voting had stabilised at roughly half that of older voters — a turnout gap that has not closed.