Which Of The Current Candidates Has The Best Chance Against Obama?

Note: Please re-read that headline.  I'm not asking who you would necessarily vote for.  We try to stay non-partisan on our show.  I'm asking who you think on the Republican side has the best chance against the Barackster.  I think I have the answer, and I would like to do that musically if you don't mind (but again, I'm not taking sides)

Ok, here's my musical prediction- but again, I'm not taking sides.  I need to make that clear-