My guess is that he doesn't see the sense in sitting down in a forum where you are likely to be demonized and prevented from stating your ideals. After you see enough O'Reilly and Hannity to know how your opportunity to speak is controlled, you don't see any reason to subject yourself to that situation.
I notice Fox is using the slogan "we report, you decide" which is more fitting to what they actually do then the "fair & balanced" claim which they probably still use too.
Of course there was the recent interview with Bill Clinton and Chris Wallace where Bubba tore Chris a new one. ( which I am positive you see totally differently )
But chances like that are few and far between when your dealing with puffed up babies who scream "cut his mic".
But, as a peace offering for those of you who like a certain amount of blood in the water, here are some intersting statistics for you :
