Republican presidential candidate and former Massachusetts Gov. Mitt Romney takes the stage Jan. 3, 2012, with his wife Ann at his caucus night rally in Des Moines, Iowa. (Associated Press)

Photo by: Charles Dharapak

Republican presidential candidate and former Massachusetts Gov. Mitt Romney takes the stage Jan. 3, 2012, with his wife Ann at his caucus night rally in Des Moines, Iowa. (Associated Press)