Given the fact that he was essentially expelled from the party for his non progressive views, the dems don't get any credit for him either.
Good point. And Lieberman from time to time, like yesterday, will publicly defy the Democrat line by showing up at places where Democrats aren't supposed to be. But he has never renounced his Democrat label, and if you asked him, he'd say he is STILL a Democrat, regardless of what the party has done to him.
Well, Lieberman has never much deviated from the DC 'Rats on domestic issues. But his support for a robust American foreign policy, especially vis-a-vis Israel and the Middle East, is incompatible with today's Democratic Party, as would be the case with some notable Democrats of a generation or two ago, like Harry Truman, JFK, Scoop Jackson, and Hubert Humphrey.