Ross plugs middle-class pandering, including a tax cut. The very smart Nate Silver, who writes must-read poll analysis for TNR, thinks it’d be shrewd. And Jeff Birnbaum said it’d be a good idea on the “All Star” panel the other night. Getting late, though. At the very least, McCain should start trying to put an easy-to-understand figure on the value of the middle-class proposals—dependent exemption, health care, this mortgage thing—that he already has.