July 23, 1968, Message from the President of the United States Transmitting A Proposal to Amend the U.S. Constitution to Lower the Voting Age to 18July 23, 1968Johnson, Lyndon B. (Lyndon Baines), 1908-1973https://creativecommons.org/publicdomain/mark/1.0/enghttp://congressarchives.org/record/EMD_Working_Papers-f366-1968_07_23Message From President Johnson About Lowering The Voting Age To 18. He States That If Young Americans Can Hold Responsibilities Like Bearing Arms, Appearing In Front Of A Court, And Shoulder Family Responsibilities, Then They Should Be Able To Vote.