Republican presidential candidates (L-R) former Utah Governor Jon Huntsman, U.S. Rep. Ron Paul (R-TX), former Massachusetts Governor Mitt Romney, former U.S. Senator Rick Santorum (R-PA) participate in a Republican presidential debate at St. Anselm College in Manchester, New Hampshire, January 7, 2012. REUTERS/Mike Segar (UNITED STATES - Tags: POLITICS ELECTIONS)