Republican presidential candidate Mitt Romney (right) campaigns in Tampa, Fla., on Wednesday, Oct. 31, 2012. With him are (from left) former Florida Gov. Jeb Bush, Sen. Marco Rubio and Rep. Connie Mack. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

Republican presidential candidate Mitt Romney (right) campaigns in Tampa, Fla., on Wednesday, Oct. 31, 2012. With him are (from left) former Florida Gov. Jeb Bush, Sen. Marco Rubio and Rep. Connie Mack. (AP Photo/Charles Dharapak)