O'Reilly goes on the old line of debate asking Dean if his rights have been violated in anyway by Bush's policies. Of course, like any American, how would Dean actually know? When someone taps your phones, they don't send you a singing telegram to announce it.
The best part comes towards the end when O'Reilly criticizes Dean for making personal attacks in his book (yet Ann Coulter does a great job at speaking the truth in the eyes of people like O'Reilly). You can tell O'Reilly gets upset that Dean had some criticism for Newt and couldn't resist coming to his defense.