I'm willing to countenance the possibility that Barack Obama genuinely believes that the DC voucher program is not helping the students who participate. Here's what I don't understand though: how come the Obama girls benefit from leaving the DC public school system? Surely, if it doesn't make any difference, the Obama girls would do just as well in ordinary, democratic, thoroughly American public schools as in an elitist Quaker institution. Wouldn't it bring wonderful diversity to both the school, and the Obama daughters, to have the children of the president rubbing shoulders with the children of the district's more ordinary...