I'm no fan of Hillary, and I would certainly prefer her not on the ticket in my view, but you've got to think about this for a moment. People in this country are stupid. There are millions of fervent menopause females out there voting for Hillary just for one obvious reason - to see a female in the office. That's all they care about. The future of the country is of second importance to many of them. For instance, my mother states she will not vote for Obama if he's the nominee and Hillary isn't his running mate, just because she's so biased towards Hillary that she can't look at things two ways.
Then you have the working class white America in certain states not voting for Obama for various reasons... NAFTA issues, economy issues, homeland security issues... even race issues. Many of those people have stated they will not vote for Obama if he wins the nomination.
Even though it might be painful, Hillary has to be the running mate for a sure win. No question. You cannot lose the entities above if the Democrats want to win this November, because as we all know, McCain will trick various morons into subscribing to fear while the women and some working class either sit at home or vote for McCain. It's sad but true. This race has been too HOTLY contested with both parties gnawing each others heads off to not have these two on the ticket, because 99% of both candidates supporters are thoroughly against one another. We need a sure win even if that means Hillary is in the White House.
You guys know all this tension is all politics anyway, but other people don't see it that way.
But I could be wrong. Perhaps many of the people I highlighted above will come together under Obama once he starts fighting McCain in August and people will be like, "WTF, McCain is just another Bush. Fuck this, Obama will get my vote." But it isn't just that simple. These are different times than prior elections, so who the hell knows what will happen.