If it makes you feel better, you can rationalize Obama's missing 10-point lead on the basis of Clintonite sulkiness, his slowness in responding to attacks, or the concern that Obama may be too handsome, brilliant, and cool to be elected. But let's be honest: If you break the numbers down, the reason Obama isn't ahead right now is that he trails badly among one group, older white voters. He does so for a simple reason: the color of his skin.