Sen. Rand Paul (R-KY) delivers remarks while announcing his candidacy for the Republican presidential nomination during an event at the Galt House Hotel on April 7, 2015 in Louisville, Kentucky. Originally an ophthalmologist, Paul rode the Tea Party wave to office in 2010.
Rep. Thomas Massie (R-KY) listens as Sen. Rand Paul (R-KY) speaks to reporters after exiting the Senate chamber, on Capitol Hill, May 31, 2015 in Washington, DC. The National Security Agency's authority to collect bulk telephone data is set to expire June 1, unless the Senate can come to an agreement to extend the surveillance programs.
Rand Paul (L), the Republican candidate for the Kentucky U.S. Senate seat, wife, Kelley, and son, wave to supporters during an election night party on November 2, 2010 in Bowling Green, Kentucky. Paul defeated Democratic candidate Jack Conway to win a U.S. Senate seat.
Sen. Rand Paul (R-KY) talks with reporters after he voted against a continuing resolution for the federal budget in the U.S. Capitol March 2, 2011 in Washington, DC. The Senate voted 91-9 to pass a two-week stopgap spending bill that will keep the government funded until March 18.
Sen. Rand Paul (R-KY) does a live interview with FOX News in the Russell Senate Office Building rotunda on Capitol Hill June 1, 2015 in Washington, DC. In protest of the National Security Agency's sweeping program to collect U.S. citizens' telephone metadata, Paul blocked an extension of some parts of the USA PATRIOT Act, allowing them to lapse at 12:01 a.m. Monday. The Senate will continue to work to restore the lapsed authorities by amending a House version of the bill and getting it to President Obama later this week.