Marco Rubio has only been in the U.S. Senate for a year and a half, but there's a lot of speculation that the Tea Party favorite could be Mitt Romney's runni...
Q&A: Marco Rubio
CPAC 2014 - U.S. Senator Marco Rubio (R-FL)
Marco Rubio: A GOP rising star
Marco Rubio: 2014 NRA-ILA Leadership Forum
Senator Marco Rubio's R.N.C. Speech - Elections 2012
Senator Rubio at The Reagan Library