Republican presidential hopefuls (from left) Rick Santorum, Mitt Romney, Newt Gingrich and Ron Paul take the stage Thursday for the Southern Republican Presidential Debate at the North Charleston Coliseum in Charleston, S.C. The GOP field is now down to four with the latest withdrawal, that of Texas Gov. Rick Perry. (Andrew Harnik/The Washington Times)

Republican presidential hopefuls (from left) Rick Santorum, Mitt Romney, Newt Gingrich and Ron Paul take the stage Thursday for the Southern Republican Presidential Debate at the North Charleston Coliseum in Charleston, S.C. The GOP field is now down to four with the latest withdrawal, that of Texas Gov. Rick Perry. (Andrew Harnik/The Washington Times)