In an interview on Tuesday with ABC and some website, Hillary Clinton laid out her last-ditch new line of attack contrast with Barack Obama:

I think that anyone who goes through the Republican attack machine, which I have for a number of years, will have their negatives driven up. That's just the way politics works. . . . And I think it's rather shortsighted of Senator Obama and his supporters to assume or think that won't happen to him. . . .

Somebody told me today that Senator Obama has never had a negative ad run against him. Well, get ready, because if he's the nominee we will see a lot of that.

I'm surprised that Hillary & Co. didn't take this angle before, because to me this has alway been the true value of her experience. She didn't polarize herself, after all -- she had tens of millions of dollars of help from right-wing interests. As I wrote last August:

Has Obama forgotten that Bill Clinton himself ran as an anti-ideological, anti-partisan candidate (criticizing the "false choices" of existing policy debates), and that the divisions during his presidency stemmed not from a failure to reach across partisan lines, but from a solid wall of Republican opposition created purely for the sake of denying him success?

That's why it's important for Obama not to become so infatuated with his success that he's afraid to tie his high-flying rhetoric to specific policy goals. Kevin Drum puts it well today:

Obama obviously has the talent to move people, and at some point he's going to have to decide whether he's willing to use that talent to start persuading the American public of the value of liberal policies, not merely the value of coming together and "making change." The latter might get him elected, but it won't get him elected with a tailwind of public opinion actively in favor of implementing a liberal agenda.

Perhaps more importantly, connecting his candidacy with the specific agenda of problems America needs solved will make it harder for the Republican sludge machine to win by eviscerating him personally. As I said to some friends over dinner the other night about the Obama-is-Muslim email smear, as far as I'm concerned, Barack could get away with saying, "Hey, yeah, I'm Muslim -- but the other guy wants to stay in Iraq for a hundred years! Your call, America."