For winning a state?  Sure.  Though I think VA and NC are going to be in play, it's difficult envisioning Obama taking AL or GA.

But what he will do is increase African-American turnout to previously unseen points - which might not affect a winner-take-all state, but may affect winner-take-all Congressional districts.  That means the RNCC has to play defense in a lot of places they didn't have to before - increasing the likelihood of our retaining or increasing our majority in the House.