Stories coming out saying that Madam Candidate Hillary Clinton (for Senate re-election now, and presidential race in 2008) is caught in a serious crack.
Hillary voted for the war in Iraq in 2003 and continues to stick with the logic that we can't just walk away (although she trods the usual wobbly Democratic line that Bush got it wrong, but she's not responsible even though she voted for it.)
This, of course, outrages the maniacally mono-focused antiwar faction in the Democratic party -- otherwise known as the base of the party.
Hence the crack -- by staying close to the center, she enrages (or rather draws unwanted ire of the already enraged) antiwar faction. If she moves in their direction, she looks like a hypocrite, and loses the center.
The first contingency makes it tough for her to get the nomination in 2008, while the second makes it tougher to win even if she does get it.
I think she has a larger problem, frankly, in getting the nomination and winning the election -- I just don't think people like her. Polling shows that less than half of Demcratic women even support her.
So basically, she's screwed.