epa04694542 (FILE) A file photograph showing US Republican Senator from Kentucky Rand Paul walks on stage to deliver remarks during the 41st Annual Conservative Political Action Conference (CPAC) at the Gaylord National Resort & Convention Center in National Harbor, Maryland, USA, 07 March 2014. Rand Paul on 07 April 2015 announced on his website that he will run for US president in 2016. EPA/SHAWN THEW