Arizona senator jokes Romney should pick Sarah Palin for his running mate as he calls for Santorum to make "graceful exit." "I think we have some very qualified candidate, obviously Marco Rubio is in the top tier, Chris Christie, there are a number of candidates we have out there, Bobby Jindal, Mitch Daniels. We have a wealth of talent out there and I am sure that Mitt will make the right choice," McCain said, referring the Florida senator, and three governors from New Jersey, Louisiana and Indiana, respectively.