Sen. Marco Rubio, Florida Republican, has been the subject of speculation that he might be vice-presidential material for the 2012 GOP ticket. He thus far has demurred. (Associated Press)

Photo by: Jae C. Hong

Sen. Marco Rubio, Florida Republican, has been the subject of speculation that he might be vice-presidential material for the 2012 GOP ticket. He thus far has demurred. (Associated Press)