Sens. Lindsey Graham (right) and Jim DeMint, South Carolina Republicans, prepare to watch the CBS News/National Journal foreign policy debate at the Benjamin Johnson Arena in Spartanburg, S.C., on Saturday, Nov. 12, 2011. (AP Photo/Richard Shiro)
**FILE** Republican presidential candidate Newt Gingrich (left) speaks Nov. 12, 2011, during the CBS News/National Journal foreign policy debate at the Benjamin Johnson Arena in Spartanburg, S.C., as fellow candidate and former Mass. Gov. Mitt Romney listens. (Associated Press)
Republican presidential candidates Newt Gingrich (right) and former Massachusetts Gov. Mitt Romney participate in the CBS News/National Journal foreign policy debate at the Benjamin Johnson Arena in Spartanburg, S.C., on Nov. 12, 2011. (Associated Press)
Republican presidential candidates Newt Gingrich (left) and former Massachusetts Gov. Mitt Romney participate in the CBS News/National Journal foreign policy debate at the Benjamin Johnson Arena in Spartanburg, S.C., on Nov. 12, 2011. (Associated Press)
