Don't try for the center, there isn't one

Paul Krugman, in today's NY Times:

So what should we do about all this? I won't offer the Democrats advice right now, except to say that tough talk on national security and affirmations of personal faith won't help: the other side will smear you anyway.

But I would like to offer some advice to my fellow pundits: face reality. There are some commentators who long for the bipartisan days of yore, and flock eagerly to any politician who looks "centrist." But there isn't any center in modern American politics. And the center won't return until we have a new New Deal, and rebuild our middle class.