Former Massachusetts Gov. Mitt Romney (left) makes a point as former House Speaker Newt Gingrich listens during the Republican presidential candidate debate at the North Charleston Coliseum in Charleston, S.C., on Thursday. (Associated Press)

Former Massachusetts Gov. Mitt Romney (left) makes a point as former House Speaker Newt Gingrich listens during the Republican presidential candidate debate at the North Charleston Coliseum in Charleston, S.C., on Thursday. (Associated Press)