Sen. Lindsey Graham of South Carolina voices his opposition to President Obama's choice of former Sen. Chuck Hagel of Nebraska as secretary of defense, on Capitol Hill last week. J. Scott Applewhite/AP hide caption

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Mark Sanford, seen at the GOP convention last summer in Tampa, Fla., saw his career as South Carolina's governor implode in 2009 when he admitted to an extramarital affair. Chip Somodevilla/Getty Images hide caption

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U.S. Rep. Tim Scott smiles during a news conference announcing him as Jim DeMint's replacement in the U.S. Senate at the South Carolina Statehouse on Monday in Columbia. Rainier Ehrhardt/AP hide caption

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Gov. Nikki Haley named Rep. Tim Scott (R-S.C.) to replace retiring Sen. Jim DeMint. In this file photo, Scott makes brief remarks after a meeting with Treasury Secretary Timothy Geithner at the U.S. Capitol on June 2, 2011. Chip Somodevilla/Getty Images hide caption

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Former House Speaker Newt Gingrich participates in the Republican presidential candidate debate in Charleston, S.C., Thursday. David Goldman/AP hide caption

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GOP presidential hopeful Newt Gingrich addresses the South Carolina Chamber of Commerce on Tuesday in Columbia, S.C. The state holds its primary on Saturday. Paul J. Richards/AFP/Getty Images hide caption

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