Use and abuse Sen. Lieberman

Poor Sen. Joe Lieberman. Ever since his speech at the RNC, he's probably the most hated Democrat in the world. There are calls to purge him from the party, but then the Democratic caucus needs him to reach the 60-seat supermajority pending senate race results from Alaska, Georgia, and Minnesota. John Nichols writes in The Nation:

If Democrats did somehow get to 60 in the Senate, and if Lieberman then betrayed the party on a critical vote, that would be the point at which to debate expelling him from the caucus.

At this point, the discussion sounds more like venting than smart, or serious, politics.

In other words, use him and abuse him until he's no longer valuable to the Democrats.