Larison, by no means an Obama supporter, sees one difference between the candidates:

McCain will have us on tenterhooks on a daily basis wondering whether he will call for impeaching the Supreme Court or bombing Uruguay and he will denounce anyone who questions his proposal as a selfish and corrupt villain, and while Obama might adopt equally awful views he will do so more slowly and allow the rest of us time to organize opposition and rational counterarguments that might actually prevail.

Yes: one of them is deliberative and sane; the other one is impulsive and, in the evidence of the last month, borderline. My worry about Obama is that he may be too cautious. But then I look at his campaign and see one of the most daring, yet unfailingly professional and careful operation. And I feel reassured.