"I know I'm taking a position that is not popular within the party," Lieberman said, "but that is a challenge for the party -- whether it will accept diversity of opinion or is on a kind of crusade or jihad of its own to have everybody toe the line. No successful political party has ever done that."
Seems to me that having a pro-war candidate and an anti-war candidate running against each other within a party is about accepting diversity of opinion. No one's kicked your ass out of the party or kept your name off the ballot, Joe.
p.s. to "the Dean," if you want to know whether someone's going to do something and you're interviewing him, you ask him.