Something's really gone off the rails when the Obama campaign decides to release an oppo document on Paul Krugman. It's not only the actual attacks that are weak (most of them rely on misinterpreting one comment, then misinterpreting the next, then pretending there's a contradiction), but, seriously, it's Paul Krugman. Arguably the most progressive voice in American media. When I argued that the campaign should take the gloves off, I really didn't expect their target, in this document and in the health care fight more generally, would be progressivism. What in hell is going on over there? Update: To say a bit more on this, the campaign's attack on Krugman raises the question they don't want to answer: What changed? When Obama's plan came out, Krugman, and me, and Jon Cohn, and all the usual suspects criticized it for lacking an individual mandate, but said that, on the overall, it was pretty good, and Obama had passed the bar. Suddenly, we're all up in arms. Why? Well, it was one thing when Obama simply didn't have a mechanism to achieve universality. It became a whole other when he began criticizing mechanisms to achieve universality. Previously, he'd gotten some flack for buying into the conservative argument that Social Security was in crisis. Now he was constructing a conservative argument against far-reaching reform proposals. And he kept doing it. And now his campaign is misrepresenting Krugman's comments in order to imply contradiction. But Krugman hasn't contradicted himself. Where his original comments focused on Obama's plan, his newer arguments are attempting to beat back Obama's rhetoric. And Obama's rhetoric has become much, much worse than his plan. That it's ended with him having to go on the offensive against the most forthrightly progressive voice in major American media is evidence of that fact.