The downside to drumming Joe Lieberman out of the Democratic caucus, as many progressives are eager to do, is that Lieberman is running point (or helping to) on several other major Obama Administration initiatives.
That won’t likely appease many folks, and the argument goes that if you don’t stand up to Joe now, you never will and it sends a terrible message about party discipline. But the fact remains: there is no move afoot in the Senate to punish Lieberman. And if there were, the White House would be unlikely to go along. At least not now.
