Here is what obama's thinking... my guess...
"If I go on the factor and look bad, all its viewers already see me as a demon. Like I"m going to LOSE FOX viewer votes? But if I go on the show and do okay, and can woo 1% of Oreilly's viewers, I just won the electoral majority in November. And, it'll deflect from mcciain's speech, along with NFL kickoff"