David Brooks has some advice about how to pick a running mate. Key paragraphs:

If Barack Obama is elected, his chief challenge will be that he hopes to usher in a new style of politics, but he has no real strategy for how to do that.

He will find himself surrounded by highly partisan Democratic politicians, committee chairmen and interest groups thrilled to finally seize power. Some of them might have enjoyed his lofty rhetoric about change, but in practice, these organization types have no interest in changing politics. They just want to take the money and patronage that has been going to Republican special interests and give it to Democratic special interests.

Government as usual.