Lieberman's honest and stands up for what he believes.
I'd say he voted against Clinton's impeachment because he believes in the Democratic party as a whole. I don't think that's so bad.
That being said, he can't get past the MoveOners to become President, which is too bad since he's the only Democrat I know of who wouldn't be an unmitigated disaster.
D
Before you all get too excited over Lieberman, remember that he played an active role in attempting to steal the 2000 election. Read "At Any Cost : How Al Gore Tried to Steal the Election"
He may be one of the most sane people in the Democrat party, but he's still a sleaze.