"And no, the Democrats aren't invalidated for Hillary or Ted Kennedy anymore than all Republicans should be invalidated for a sleeze like Tom Delay."

I think Lieberman is very effective as an opposition leader. A question about "all democrats" is, will he be their presidential choice in 08 or will it be Clinton.

If the Democrats had chosen Lieberman last time instead of Kerry, the Democrats would have probably won the election {though it's not a given that most Democrats actually wanted to win the Presidency}. Of course if the Democrats had chosen almost anyone other than Kerry, they would have had a better chance.