U.S. Senator Lindsey Graham (R-SC) arrives for a news conference about proposed gun violence legislation at the U.S. Capitol in Washington in this file photo taken March 6, 2013. Graham looks poised ... more 
U.S. Senator Lindsey Graham (R-SC) arrives for a news conference about proposed gun violence legislation at the U.S. Capitol in Washington in this file photo taken March 6, 2013. Graham looks poised to be the latest member of the Republican establishment to fend a primary challenge from the Tea Party, overcoming criticism from some members of his party that he is not conservative enough. REUTERS/Jonathan Ernst/Files (UNITED STATES - Tags: POLITICS ELECTIONS) less 
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Reuters | Photo By JONATHAN ERNST / REUTERS
Fri, Jun 6, 2014 6:21 PM EDT