Oh, my. Can you just imagine if Sarah Palin or John McCain made a crack like this and botched up their pop culture references to famous black comedy shows? Can you just imagine the high dudgeon from every minority lawmaker? WaPo and NYTimes columnist? Civil rights organization? The cries of RAAAAAAAAAAAAAAAAAAAAACISM would shatter the political Richter scale. Can you just imagine: This is what happens when a candidates goes off script. Barack Obama, in Raleigh, N.C., was doing a riff attacking John McCain for supporting the idea of putting some mandatory retirement money into the stock market. “If Senator...