In the middle of a discussion with Rachel Maddow on the responsibilities of 24-hour cable news channels, David Letterman gave his two cents on Fox News political commentator Bill O'Reilly.
The host of the 'Late Show' (weeknights, 11:35PM ET on CBS) 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," said Letterman. "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 [says he] believes."
The MSNBC host listened politely but disagreed. "I don't know ... He got very upset with me. He called me a loon. I think loons are cute!"
The debate then ended abruptly when Letterman suggested they trade glasses.