Did you notice how fast he was talking after the trash talk? It was like he was going to hyperventilate.
Your question wasn't directed to me, but I sure noticed it. It was right after he accused O'Donnell and/or her campaign of spreading rumors of Castle having an affair...looked to me like he did some FAST and transparent fancy footwork to change the subject when asked to support his allegation.
I may be wrong, but I really think there is something really odd going on with him. Heard some of the show when he replaced Rush for a day, sounded kind of weird then, embarrassingly weird on one segment. Did not listen too much that day.