David Letterman took a jab at Bill O'Reilly while hosting MSNBC's Rachel Maddow on his show saying " I don't think you can be as smart as he is and actually believe what he believes", his theory is driven by the idea that he only does it for the money. Of course, Letterman is not only taking a shot at O'Reilly, but at Conservative beliefs in general-- which no doubt made his ultra left-leaning guest feel all warm and fuzzy inside. Letterman said, " I have a theory about Bill O'Reilly, smart guy, and I think he knows better than what he's doing-- but he's just found a place to make a living. He'd be a weatherman if the money was right, or he'd do sports if the money was right. He's just doing this because that's where the money is. I don't think you can be as smart as he is and actually believe what he believes." As if Rachel Maddow is any different.

(h/t FoxNation)