No we don't. Being a Democrat (or a Republican) does not mean always supporting the Democratic candidate.
The people like myself who advocated Lieberman's defeat in 2006 were attacked and called every name in the book. We were right about everything, every accusation.
You abandoned a guy based on 1 issue, and then called him a traitor because he didn't agree with you. It's his right to support the war if he wants; remember, without him, we wouldn't have the Senate majority this year. He could've voted with the GOP, but he chose to vote with us, because he is a Democrat.
That 1 issue is way more important than anything else. A reason why our economy is doing so bad is because of the inflation caused by the Iraq war spending. The dollar has fallen because we are spending money we don't have( or borrowing from the chinese). Now this may lead to greater exports but we will see if that happens.