That is to say, realisticly, Weicker does not command the history of electoral prowess that Bernie Sanders does, to make Dems realize that opposing him would be counter-productive. With Lieberman running for re-election, I think Weicker would be terrific for Progressives to rally around. But against a Republican, I think some strong Dems would quickly appear who have been longing for a shot at Lieberman's empty seat.
John McCain is not pro-choice!