He'd probably be a good prez, something like Bill Clinton but more interesting and not as politically correct, because he's a social moderate, because he's smart and mainly because he doesn't follow the usual politician's boring, predictable behavior. Is more in touch with the electorate IMO, able to provide reasonable, moderate progressive decision-making socially combined with Republican approaches on the economy. Most people would appreciate that, as has been seen recently.
Unlikely to have the opportunity to be Prez, but could play a substantial role in the cabinet.