Republican presidential candidate Mitt Romney greets supporters and signs autographs during a rally at American Douglas Metals in Orlando, Florida, Wednesday, January 25, 2012. Joe Burbank / MCT
Republican presidential candidate Mitt Romney greets supporters and signs autographs during a rally at American Douglas Metals in Orlando, Florida, Wednesday, January 25, 2012. Joe Burbank / MCT
Republican presidential candidate, former House Speaker Newt Gingrich speaks at Florida International University, Wednesday, Jan. 25, 2012, in Miami, Fla. Matt Rourke / AP
In this Oct. 5, 2011 file photo, Sen. Marco Rubio, R-Fla., speaks at the Newseum in Washington. As the GOP presidential race shifts to Florida, all eyes are on Rubio, the son of Cuban immigrants and one of Florida's most popular officials. Haraz N. Ghanbari / AP