Punish Lieberman

How to deal with a traitor? Joe "Enron" Lieberman's triangulation is an old problem - Lieberman doesn't understand politics that doesn't feature triangulation of some sort. He must be disciplined. It's not a matter of centrism. Harry Reid is more centrist than Lieberman, but Reid knows when he has room for maneuver and when he doesn't. Joe doesn't, and he thinks he does.