Ratified: July 1, 1971
Section 1: The right of citizens of the United States, who are eighteen years of age or older, to vote shall not be denied or abridged by the United States or by any State on account of age.
Section 2: The Congress shall have power to enforce this article by appropriate legislation.
This amendment was passed near the end of the Vietnam War. At the time the voting age was 21 and the argument for lowering it to 18 was that people were old enough to fight and die for the country at and should be allowed to vote for the same country.