Washington Post (and Commonweal) columnist E.J Dionne offers an interesting historical perspective on the Obama-Clinton debate:

If Obama seems to have history's winds at his back, Clinton is carrying history's burdens. In trying to push her way back into the contest by Feb. 5, when nearly two dozen states vote, Clinton would have to press her sober case that as good as Obama sounds, she's the one who is vetted and tested. "If you want to know which kind of change we will make," she pleaded to her Sunday night crowd, "look at what we've already done."

Here again, the echoes of the past are eerie. It was Hubert Humphrey, on the aging side of the generational divide in 1968, who declared: "Some people talk about change, others cause it." Hubert Humphrey was a great man. He did not become president.