The Political Pitbull provides the transcript:

Q: Why won’t you make TV appearances with RNC Chairman Ken Mehlman? We’ve tried to book you a number of times on various NBC programs and been told by your staff that you won’t make appearances with him. Why?

DEAN: The reason I don’t do that is because the spectacle of the debate overwhelms the desire to get message out and talk about policy and serious issues. You know, a lot of what happens on television is what I call infotainment. And I don’t think that’s a particularly good thing. Interviews like this give us a particularly good chance to talk about our message. Debates with Ken simply inflame things and it looks um, gladiatorial contest. I’m interested in getting the message out not gladiatorial conferences, er, contests for the sake of entertainment.

Last year Dean was scheduled to debate Mehlman on Meet the Press, but pulled out at the last minute.