:::::::Luke, you cannot possibly split explicit "moderates" and apathetic "don't knows" in half and claim them as self-identifying liberals.  Do you have any actual evidence for your 'Most undecideds are intimidated liberals' claim?  That's hogwash.  Most undecideds are, in fact, undecided!  The simple fact remains is that there are significantly more self-identifying conservatives in the US than there are self-identifying liberals.  Politicians understand that, and thus depending upon party either attack or run away from the explicit "liberal" label, especially in statewide and evenmoreso nationwide elections.  Are you claiming that this phenomenon has had no effect on the development and course of recent American liberalism, and is thus unworthy of mention here?  Silly.