I should call this "DNC No Thought Process" since the answer to every problem is "be more conservative." It doesn't help that the national media and Democrats themselves label even the slightest leftward direction "radical."
What happened to the true liberals? (I'm sorry, but Obama is at best a moderate Dem, despite what Glen Beck tells you.) Outside of a handful of senators (Sanders, Franken, Feingold), every one of them can't wait to race to the "center" fast enough. Nevermind that the center has drifted so far right that even Nixon would be considered a liberal today (he wanted crazy things like affordable tuition and health care reform).
The bottom line is, given the choice between a Republican and a Republican wannabe, people are gonna go with the real deal.