What to do with lieberman?

Over the next week the Democrats will be figuring out whether to let Joe 
Lieberman retain his chairman****p or to excommunicate him. It's an 
interesting position, given their current senate vote advantage (strong, 
but not 60, and not likely to be). Many Senate Democrats want to retain 
him (Evan Bayh makes the case, transcribed from maddow's show at Joan 
Walhs's Salon column). Others want to punish him for not only 
campaigning for Mccain, but for actively campaigning against Obama and 
campaigning for Coleman in MN. Some re****ts suggest Obama might want him 
retained, as a sign of moving forward without acrimony.

Thoughts? Should he stay or should he go?

Colin