FILE - In this Jan. 16, 2012 file photo Republican presidential candidates former Pennsylvania Sen. Rick Santorum, former Massachusetts Gov. Mitt Romney and former House Speaker Newt Gingrich pose for... more 
FILE - In this Jan. 16, 2012 file photo Republican presidential candidates former Pennsylvania Sen. Rick Santorum, former Massachusetts Gov. Mitt Romney and former House Speaker Newt Gingrich pose for a photo at the start of the South Carolina Republican presidential candidate debate Monday, Jan. 16, 2012, in Myrtle Beach, S.C. Millions of dollars spent by Romney allies on TV ads attacking his two main rivals have helped him pull ahead in the race. Every election bruises feelings, but campaign veterans say Santorum and Gingrich feel the commercials were pointedly unfair, and that's a big reason they keep fighting. (AP Photo/David Goldman, File) less 
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Associated Press | Photo By David Goldman, File
Sun, Mar 18, 2012 10:19 AM EDT