It's really a lot of fun when the guest is a bit baffled at first. Case in point. Lou Dobbs comes on with a book "War on the Middle Class".

Jon Stewart: Well, maybe war on the middle class might be good for the middle class. After all, consider the war on drugs, the war on terror. Things we have declared war on have done pretty well.

Dobbs was visibly taken aback--but recovered soon.