The Obama campaign is built on making him seem inevitable. All through the election whenever the race got tight they would release some piece of information to tack back to this narrative. The problem came in the debate when they could no longer maintain it. Their new meme is that they've banked more votes than the GOP can make up, but the numbers released by AP just don't support that conclusion.
Goes back to the turnout and INDs. If Romney maintains his sizable lead with INDs and gets near parity with GOP voters then it is impossible to lose.
We'll know soon!