GOOD QUESTION: “I have a question for the Columbia crowd, since Holocaust deniers are welcome, would you allow a speaker in favor of a return to black slavery? I hope not. Well, that’s how I feel about Holocaust deniers. What are the speaker rules at Columbia? Does anybody know? How far can you go?”

As far as you want, but only so long as the message is sufficiently anti-Bush.

UPDATE: Columbia won’t cancel Ahmadinejad speech. Their concern for the free exchange of ideas seems a bit . . . selective.