Watch as MSNBC's David Shuster ends up in a shouting match with conservative "documentarian" John Ziegler. Hint: here's how you can tell that Ziegler is more than a little nutty--Ziegler has a serious fixation with O.J. Simpson and finds ways to drop O.J. Simpson references into unrelated conversations in ways that are kind of inappropriate . . . like this one, for instance.
Ziegler is a good example of the sort of borderline personalities that the right wing promotes as spokespeople for the Republican Party. It's well worth your time to read Ziegler's bio and familiarize yourself with Ziegler's background and mental tics.