File photo of U.S. Senator Rand Paul, son of Republican Presidential candidate Ron Paul, smiles after taking the oath of office

 
File photo of U.S. Senator Rand Paul, son of Republican Presidential candidate Ron Paul, smiles after taking the oath of office
U.S. Senator Rand Paul (R-KY), son of Republican Presidential candidate Ron Paul, smiles after taking the oath of office during a ceremonial re-enactment in the Old Senate Chamber at the U.S. Capitol in Washington, in this January 5, 2011 file photo. Paul was detained by TSA officials at Nashville International Airport on the morning of January 23, 2012, said airport spokeswoman Emily Richard. Photo taken January 5, 2011. REUTERS/Jonathan Ernst/File (UNITED STATES - Tags: POLITICS HEADSHOT)