On 30 June, the 26th Amendment to the U.S. constitution was ratified by Congress, thus lowering age in all elections to 18 years of age.
Richert, Lucas Paul. "26th Amendment ratified". The Literary Encyclopedia. First published 01 November 2008
[http://www.litencyc.com/php/stopics.php?rec=true&UID=5685, accessed 02 July 2015.]