It seems to be that two political theories of the last decade have both been proven true at the same time: 1) the centrist Democrats have not actually brought over a reliable, significant number of centrist Republicans. The vast majority of Rs still think that any R is better than any D and simply hold their noses no matter how awful. We still haven't found a bottom of how low they will sink. 2) When more left-wing candidates have run, the theory that moving to the left will attract new voters who are energized by liberal populism has not really shown up in election results either, with a few exceptions in already liberal areas. I think that part of the internal struggle of the Democratic party is that neither its centrist nor left leaning wings have been able to grow the party in sustainable ways. We are all still just fighting over the same 2-3% of anti-incumbent swing voters each cycle. Does that seem right?