Lieberman is a problem for the Democrats. Most of them want to throw him under the bus for his stab in the back behavior during the campaign. Most do not think he should have the plush chairmanship of the Homeland Security Committee. Harry Reid is trying to get Lieberman to step down without fuss. He doesn't want to. So the talk is that the entire caucus will vote to throw him out.
I think this is where Obama could step in. Appoint Lieberman to a cabinet position in an area that he has competence and is in agreement with Democrats. Like Interior. Which is a mess and Bush is making messier. Like let's mine for uranium in the Grand Canyon and pollute the Colorado.
Then Connecticut can appoint a Democrat to replace Joe.