re: #53 Sharmuta
Ok, those are good points. 5 months ago there were probably quite a few Independents who identified as Democrats, mostly out of the excitement of voting for Obama. Now the electorate is waking up to one hell of a hangover and re-evaluating their former enthusiasm. Hence the slipping numbers.
It would be useful to see the graphs for past post-election eras, for comparison. Is that sort of slippage normal? My guess is yes.