File- This Oct. 18, 2011 file photo shows Senate Small Business and Entrepreneurship Committee member Sen. Rand Paul, R-Ky., questioning Treasury Secretary Timothy Geithner on Capitol Hill in Washington.  In just half a term, the Kentucky Republican has shaken up Congress and in some ways the country with his brand of libertarian populism, filibustering President Barack Obama’s CIA director earlier this year and leading the fight against authorizing U.S. military action in Syria. (AP Photo/Manuel Balce Ceneta, File)

Photo by: Manuel Balce Ceneta

File- This Oct. 18, 2011 file photo shows Senate Small Business and Entrepreneurship Committee member Sen. Rand Paul, R-Ky., questioning Treasury Secretary Timothy Geithner on Capitol Hill in Washington. In just half a term, the Kentucky Republican has shaken up Congress and in some ways the country with his brand of libertarian populism, filibustering President Barack Obama’s CIA director earlier this year and leading the fight against authorizing U.S. military action in Syria. (AP Photo/Manuel Balce Ceneta, File)