Ezra Klein on the "unity ticket":
...an Obama-Clinton ticket makes no sense. She is not the only Democratic politician with a connection to working class white voters. Moreover, she steps on his central narratives of unity and transformation. I think he probably has to pick a woman -- or at least would be wise to pick a woman -- but Clinton does him harm without doing him much good. And does he really think he can control an operation as brash and overbearing as hers? Will Mark Penn really defer to David Axelrod? Will Bill Clinton?
The whole idea is pretty silly, when you think about it for more than a couple of minutes.