Kamikaze Mission

I'm thinking either she figures she really does stand an outside chance of winning nomination by virtue of being the last candidate standing. Or she just doesn't care about the health of the party or the country and is willing to bloody up Obama for the general election allowing McCain to get in and she can run again in 2012. Here's Jonathan Chait's take at The New Republic:

Hillary Clinton, Fratricidal Maniac
Clinton's path to the nomination is pretty repulsive. She isn't going to win at the polls. Barack Obama has a lead of 144 pledged delegates. That may not sound like a lot in a 4,000-delegate race, but it is. Clinton's Ohio win reduced that total by only nine. She would need 15 more Ohios to pull even with Obama. She isn't going to do much to dent, let alone eliminate, his lead. […]

Clinton's path to the nomination, then, involves the following steps: kneecap an eloquent, inspiring, reform-minded young leader who happens to be the first serious African American presidential candidate (meanwhile cementing her own reputation for Nixonian ruthlessness) and then win a contested convention by persuading party elites to override the results at the polls. The plan may also involve trying to seat the Michigan and Florida delegations, after having explicitly agreed that the results would not count toward delegate totals. Oh, and her campaign has periodically hinted that some of Obama's elected delegates might break off and support her. I don't think she'd be in a position to defeat Hitler's dog in November, let alone a popular war hero.

Some Clinton supporters, like my friend (and historian) David Greenberg, have been assuring us that lengthy primary fights go on all the time and that the winner doesn't necessarily suffer a mortal wound in the process. But Clinton's kamikaze mission is likely to be unusually damaging. Not only is the opportunity cost--to wrap up the nomination, and spend John McCain into the ground for four months--uniquely high, but the venue could not be less convenient. Pennsylvania is a swing state that Democrats will almost certainly need to win in November, and Clinton will spend seven weeks and millions of dollars there making the case that Obama is unfit to set foot in the White House. You couldn't create a more damaging scenario if you tried.