The Twenty-sixth Amendment (Amendment XXVI) to the United States Constitution established a nationally standardized minimum age of 18 for participation in state and federal elections. It was proposed by Congress on March 23, 1971, and three-fourths of the states ratified it by July 1, 1971.
Various public officials had supported lowering the voting age during the mid-20th century, but were unable to gain the legislative momentum necessary for passing a constitutional amendment.
The drive to lower the voting age from 21 to 18 grew across the country during the 1960s and was driven in part by the military draft held during the Vietnam War. The draft conscripted young men between the ages of 18 and 21 into the United States Armed Forces, primarily the U.S. Army, to serve in or support military combat operations in Vietnam. This means young men could be required to fight and possibly die for their nation in wartime at 18. However, these same citizens cannot have a legal say in the government's decision to wage that war until the age of 21. A youth rights movement emerged in response, calling for a similarly reduced voting age. A common slogan of proponents of lowering the voting age was "old enough to fight, old enough to vote".
Determined to get around inaction on the issue, congressional allies included a provision for the 18-year-old vote in a 1970 bill that extended the Voting Rights Act. The Supreme Court subsequently held in the case of Oregon v. Mitchell that Congress could not lower the voting age for state and local elections. Recognizing the confusion and costs that would be involved in maintaining separate voting rolls and elections for federal and state contests, Congress quickly proposed and the states ratified the Twenty-sixth Amendment.
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Background
The framers of the U.S. Constitution did not establish specific criteria for national citizenship or voting qualifications in state or federal elections. Before the Twenty-sixth Amendment, states had the authority to set their own minimum voting ages, which was typically twenty-one as the national standard.
Senator Harley Kilgore began advocating for a lowered voting age in 1941 in the 77th Congress. Despite the support of fellow senators, representatives, and First Lady Eleanor Roosevelt, Congress failed to pass any national change. However, public interest in lowering the voting age became a topic of interest at the local level. In 1943 and 1955 respectively, the Georgia and Kentucky legislatures approved measures to lower the voting age to 18.
President Dwight D. Eisenhower, in his 1954 State of the Union address, became the first president to publicly support prohibiting age-based denials of suffrage for those 18 and older. During the 1960s, both Congress and the state legislatures came under increasing pressure to lower the minimum voting age from 21 to 18. This was in large part due to the Vietnam War, in which many young men who were ineligible to vote were conscripted to fight in the war, thus lacking any means to influence the people sending them off to risk their lives. "Old enough to fight, old enough to vote" was a common slogan used by proponents of lowering the voting age. The slogan traced its roots to World War II, when President Franklin D. Roosevelt lowered the military draft age to 18.
In 1963, the President's Commission on Registration and Voting Participation, in its report to President Johnson, encouraged lowering the voting age. Johnson proposed an immediate national grant of the right to vote to 18-year-olds on May 29, 1968. Historian Thomas H. Neale argues that the move to lower the voting age followed a historical pattern similar to other extensions of the franchise; with the escalation of the war in Vietnam, constituents were mobilized and eventually a constitutional amendment passed.
Those advocating for a lower voting age drew on a range of arguments to promote their cause, and scholarship increasingly links the rise of support for a lower voting age to young people's role in the civil rights movement and other movements for social and political change of the 1950s and 1960s. Increasing high-school graduation rates and young people's access to political information through new technologies also influenced more positive views of their preparation for the most important right of citizenship.