Charleston Republican presidential debate
Republican presidential candidates, from left, former U.S. Sen.
Republican presidential candidates debate at the North Charleston Coliseum in Charleston, S.C., on Thursday, Jan. 19, 2012.
The candidates take the stage before the debate. From left: Rick Santorum, Mitt Romney, Newt Gingrich and Ron Paul. (Matt Rourke / Associated Press)
Newt Gingrich gestures during the final Republican presidential debate before South Carolina’s primary. (David Goldman / Associated Press)
Candidate and former Pennsylvania Sen.
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Former Massachusetts Gov.
Rep. Ron Paul of Texas has his turn in the debate. (David Goldman / Associated Press)
Mitt Romney makes his point as the other candidates listen, from left: Rick Santorum, Newt Gingrich and Ron Paul. (Emmanuel Dunand / AFP / Getty Images)