10. He assumed that it was a gag twentieth anniversary celebration thrown together by Michelle.
9. His puppy chow snack an hour before the debate didn’t agree with him.
8. He was distracted by receiving debate advice from Biden in his earpiece.
7. Newt Gingrich told him he had nothing to worry about.
6. Jim Lehrer gave Obama advance knowledge of the questions he would ask, but then Lehrer forgot the questions.