Republican presidential hopefuls, from left, former Sen. Fred Thompson, R-Tenn., former Massachusetts Gov. Mitt Romney, Sen. John McCain, R-Ariz., former Arkansas Gov. Mike Huckabee, former New York City Mayor Rudy Giuliani, and Rep. Ron Paul, R-Texas participate in a Republican debate on FOX News Channel in Myrtle Beach, S.C., Monday, March 12, 2007. (AP Photo/Mary Ann Chastain

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