Well, I've been watching the toobz all day and it's clear the consensus storyline for tonight is this: Clinton wins Indiana, Obama wins North Carolina. If either pulls off an upset, it spells trouble if not potential doom for the loser.

CNN and MSNBC both just projected that Obama has won in North Carolina, based on exit polls.

Meanwhile, CNN has been running disturbing poll numbers indicating that many of the current crop of Hillary Clinton voters are saying they won't vote for Obama in the fall:

According to the exit polls, half of Clinton's supporters in Indiana would not vote for Obama in a general election match up with John McCain. A third of Clinton voters said they would pick McCain over Obama, while 17 percent said they would not vote at all. Just 48 percent of Clinton supporters said they would back Obama in November.

Obama gets even less support from Clinton backers in North Carolina. There, only 45 percent of Clinton supporters said they would vote for Obama over McCain. Thirty-eight percent said they would vote for McCain while 12 percent said they would not vote.

Obama voters appear to be more willing to support Clinton in November. In Indiana, 59 percent of Obama backers said they'd vote for Clinton, and 70 percent of Obama backers in North Carolina said they'd support the New York Democrat.

These poll numbers do reveal a potential vulnerability for Obama -- namely, the persistence of racism as a motivating factor in voter behavior, and its possible appearance here. As we've said, merely waving a magic wand of "transcending politics" won't make it go away. Certainly, some of these "dropouts" just don't like him as a candidate, but some are doing so for troubling reasons.

However, you can't help but wonder if the reality that at least some of these "working class white voters" who are coming out for Hillary are actually doing so at the behest of people like Rush Limbaugh -- the very people who have made her life a living hell for chunks of the past 16 years, and people who are doing so with the explicit intent of throwing the Democratic Party into chaos -- doesn't prick Clinton's conscience a little.