Fiery charges: Romney, Santorum assail each other
Republican Presidential Debate, Mesa, Ariz., Feb. 22, 2012
Credit: AFP/Getty Images
Republican presidential candidates Ron Paul (L), Rick Santorum (2nd L), Mitt Romney (2nd R) and Newt Gingrich debate on February 22, 2012 in Mesa, Arizona. The Arizona and Michigan primaries are scheduled to be held February 28. At right is moderator John King. AFP PHOTO/DON EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
