**FILE** Sen. Marco Rubio, Florida Republican, speaks Nov. 17, 2012, during Iowa Gov. Terry Branstad's annual birthday fundraiser in Altoona, Iowa. (Associated Press)

Photo by: Charlie Neibergall

**FILE** Sen. Marco Rubio, Florida Republican, speaks Nov. 17, 2012, during Iowa Gov. Terry Branstad's annual birthday fundraiser in Altoona, Iowa. (Associated Press)