Republican presidential candidate, former Massachusetts Gov. Mitt Romney, greets audience members after speaking at the National Gypsum Company in Tampa, Fla., Tuesday, Jan. 24, 2012. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

Republican presidential candidate, former Massachusetts Gov. Mitt Romney, greets audience members after speaking at the National Gypsum Company in Tampa, Fla., Tuesday, Jan. 24, 2012. (AP Photo/Charles Dharapak)