We’re still waiting on Arizona — that has to be a little embarrassing for McCain, even though it’s winner-take-all. We’re also waiting on Missouri, Tennessee, and Oklahoma. (Alabama also hasn’t been called by anyone except for Fox, which called it for Huckabee.) Romney has won Massachusetts, and he’ll win Utah, but he really, really needs to win one of these other races if he’s going to be able to justify staying in the race.
RealClearPolitics has a pretty good at-a-glance rundown.
