In an election year when Democrats were handily defeating well-liked Republicans throughout the Northeast, and with the formal endorsement of the party, plus having a top-flight political advisor on loan from Hillary, Ned Lamont still couldn't pull out a win. What gives?
I suspect that a large portion of the CT electorate A) really didn't think there was that much wrong with Liberman (No accounting for taste...) B) didn't find anything particularly compelling about Lamont, and C) really disliked assholes like Atrios and Jane Hamsher behaving like petulant three year olds and trying to manipulate politics in states other than their own. Lamont, to his discredit, ran a campaign better known for the racist shenanigans of its "netroots" demagogues than for anything of value he had to say.
Mostly what Lamont's campaign did was solidify the neo-Naderite lunatic wing of the left and make otherwise sympathetic people like myself reject them, and their candidates, entirely. I don't like the Rethugs calling me a traitor, and I don't much care for the Naderites doing so, either. I look back at the election and wonder what all that money and media time could have been better spent on. And, of course, there is now a vengeful Joe Lieberman on the loose in the Senate. Nice going, Jane & Duncan!