U.S. Republican presidential candidates before Republican presidential debate in Mesa

 
U.S. Republican presidential candidates before Republican presidential debate in Mesa
U.S. Republican presidential candidates U.S. Rep. Ron Paul (R-TX) (L) and former U.S. Senator Rick Santorum shake hands as former Massachusetts Governor Mitt Romney and former Speaker of the House Newt Gingrich applaud before the start of the Republican presidential debate in Mesa, Arizona, February 22, 2012. REUTERS/Joshua Lott (UNITED STATES - Tags: POLITICS ELECTIONS)