As the battleground states shake out the endgame for Mitt Romney now appears to be that he must win Florida, Virginia, Ohio, and Colorado. If he loses any of those states President Obama will almost certainly win re-election.
All of these (except for Colorado) were pretty much must win states in any Romney victory scenario.
The race isn’t over, but it’s narrowed to a single path for the Romney/Ryan ticket.
Update: At 11:15 PM Fox called Ohio for Obama, effectively ending Romney’s chances. CNN quickly followed suit – calling the election for Obama before calling Ohio.
Update 2: The Romney camp isn’t quite conceding Ohio just yet, with just a few thousand votes separating the two candidates. They may do so, just not yet.