"Defeating liberals, in as public a way as possible, has long been a central pillar of "moderate" Democratic strategy. Blue Dogs, Conservadems, the DLC and others believe that they must do everything possible to distance themselves from liberal Democrats in order to be successful. If they are viewed as regular old Democrats, and not as a new wave of bi-partisan, moderate Democrat, then they honestly believe they are screwed. Lieberman is just an especially spiteful version of this."
Chris Bowers @open left