I don't understand this:
Lieberman Has “Superdelegate” Status Stripped Because of McCain Endorsement
Lieberman's endorsement of Republican John McCain disqualifies him as a super-delegate to the Democratic National Convention under what is informally known as the Zell Miller rule, according to Democratic State Chairwoman Nancy DiNardo.OK, I don't understand - wasn't the fact that Lieberman is no longer a Democrat enough to disqualify him?
What am I missing here?
