This is like the third consecutive poll to show Obama's lead at +4 (SV and MD being the other two). I still don't quite understand why Obama doesn't visit the state sometime within the next 77 hours or so. Even if he doesn't, the odds are still on his side in PA (and he's not going to lose the EV while up +5 nationally), but why take that risk?
If his people think he's really in danger, he'll go back. If they don't, he won't. I'll trust them on this. Axelrod and co. know what they are doing. Let's not forget the tons of other polls that still have it at double digits.