Former Massachusetts Gov. Mitt Romney (left), accompanied by Sen. John McCain, Arizona Republican, campaigns for the GOP presidential nomination at the Boys and Girls Club in Salem, N.H., on Thursday, Jan. 5, 2012. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

Former Massachusetts Gov. Mitt Romney (left), accompanied by Sen. John McCain, Arizona Republican, campaigns for the GOP presidential nomination at the Boys and Girls Club in Salem, N.H., on Thursday, Jan. 5, 2012. (AP Photo/Charles Dharapak)