O'REILLY: You didn't know anything about the Swift Boat ads before they went on the air, did you?
BUSH: No. I didn't.
O'REILLY: Did Karl Rove know anything about it?
BUSH: I don't think so. In other words, you're asking if anybody coordinated this in our campaign?
O'REILLY: No, whether they'd give you a heads up they were going to do it.
BUSH: Not to my knowledge.
...and then describes Pres. Bush as looking "awfully sick to his stomach".
I don't see anything sinister here. So he didn't say "Absolutely not!!"; he knows better than to vouch for the actions of people he can't watch 24/7. When you don't know the answer to a question, the correct response is "I don't know". The stupid response is to speak of things you cannot know about. Bush knows better.