It's worth noting, in light of this MSNBC post that asks whether Indiana could go blue this year, that of the remaining primary states, only two have voted for Democratic presidential candidate since the 1970s, Oregon and Kentucky. The rest haven't supported a Democrat since Lyndon Johnson, and, although North Carolina went for Jimmy Carter in '76, I think we can safely consider that an aberration (before that it was 1964 as well). Now it's true that voters are registering Democratic in record numbers in places like North Carolina, but this doesn't necessarily point to a red-blue shift in these states. Rather, it seems that Democrats, or Democatic-leaning voters are excited about their choice, and that means high turnout and registration. But the jury's still out on whether all these new potential Democratic votes will be enough to flip these states in the general election. Also read Holly Yeager's take from last week on the main site.
--Mori Dinauer