If Mit Romney can get past the primaries after explaining why he passed the disasterous state run healthcare in Massechusets he would be the lead candidate.
Newt Gingrich, Tim Pawlenty (Minnesota Governor), Mitch Daniels.
Look for someone like Florida Senator Marco Rubio or Louisiana Governor Bobby Jindal as VP.
I really Like Charlie Christ of New Jersey because he tells it like it is and don't give a crap what people think about it but he has said countless times he has not desire to be president. Given his "tell it like it is" attitude I tend to believe him.
