Why do you think he was so sure month ago before the election, that he would be reelected?
Think about it.
I think it was as much the arrogance of the Romney campaign as it was any vote theft. One only has to look at how the Romney camp excluded conservatives, ran the most idiotic GOTV campaign in modern history (ORCA) and failed to have any kind of significant swing state voter drive to see they didn’t understand the fight they were in. They thought they just had to sit back and wait for Obama to lose, instead of playing to win.