Depending on your angle, Hillary has to drop out to save the party, should stay in to save the party, should fly to the moon to save the party.
Harold Meyerson over at the WaPo has written the liberal view on what a lot of conservatives have been saying about the final outcome of the Democrat's process in "Titans On The Mat".
That view is that Clinton can't win without destroying the party. A victory by her will assure that the black vote stays home, or shows in a dwindling number come november. The youth vote that Obama has gained would walk too, and then of course, Hillary would be crushed by McCain.
The problem with that is if Hillary doesn't get the nomination, then you have the Florida and Michigan voters who will (rightfully) be able to say that Obama didn't want them counted. Make no mistakes about it, quotes from Obama and his crew that killed any possibility of a revote in those states back in March and April, and having them count will pop up in October.
This hasn't been discussed much since April when Obama killed the "do over" vote plans in both states, and now acts as if they don't exist.
The other group that will probably bail on Obama in fair numbers is the white working class. Especially those in the upper middle class who will be reminded (ad naseum) of his tax plans that will crunch that group hard. He hasn't done well with them in any state, and it's hard to believe a scenario where suddenly they find him the savior. In fact many of them might be a little "bitter" about him.
Finally, and I think this group is ignored way to often by the media and politicians, the older vote. Hillary Clinton has carried the AARP vote in every primary. Many of them will see in McCain a guy their age, or slightly older, with more experience, who can talk to them.
And while the Democrats love to rage about the youth vote, the AARP group is voting in much bigger numbers in every primary. When you break down the demographics, it's a much more important block of voters than the unreliable youth, who may well lose interest by November if a good PS3 games comes out.
It's going to be an interesting time, the next few weeks, as Hillary tries to hang on, and I think eventually realizes she can't. But she will try, and may well alienate more voters in the process, creating a bigger chasm in the Democratic Party in the process.