Old enough to vote?
Michigan Senator Arthur H. Vandenberg introduced Senate Joint Resolution 166 on October 19, 1942. This resolution would have amended the Constitution of the United States and extended the vote to citizens 18 years or older. Although not ratified at the time, the proposal came up again, during the Vietnam War. The 26th Amendment was ratified on July 1, 1971.
National Archives, Records of the U.S. Senate Used with the permission of the U.S. Senate