Check out this frame, about 25 seconds in to McCain's "Accountable" ad.
Unless I'm mistaken, the woman McCain whose hand McCain shakes is wearing an Obama tee-shirt. I think the footage comes from McCain's appearance at the Lorraine Motel on the anniversary of MLK's death.
We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.
Marc Ambinder is an Atlantic contributing editor. He is also a senior contributor at Defense One, a contributing editor at GQ, and a regular contributor at The Week.