I had been thinking that, with Mitt Romney possibly poised to exit the race soon and likely to be looking for what to do next to build credibility with conservatives, a logical next step whether he intends to pursue national office or simply find a way to do some real public good would be to move back home to Michigan and run for Governor. After all, Romney's core strength - his business acumen - is the one thing Michigan needs most desperately after two terms of Jennifer Granholm.
Sadly, however, Michigan's Constitution requires that the Governor must "have been a registered elector in this state for four years next preceding his election." Since the next race is in 2010, there will not be sufficient time for Romney to establish residency. My guess is, the likelihood is that if Romney is planning to run for president again, he will probably do so via the John Edwards path of spending four more years campaigning without adding to his short resume in public office and thus without a realistic mechanism for proving his conservative bona fides.