You hear that sound? Of course you do. It’s a dog whistle. I’m told that we conservatives (read: racists) use dog whistles all the time to clandestinely run down members of minority groups and others with whom we disagree. It is fascinating, I will concede, that the people we use these coded messages to badmouth—blacks, Latinos, etc.—often seem more adept at hearing the high-frequency whistles than we do. Why, just today, Rep. Sheila Jackson Lee became the latest member of the Congressional Black Caucus to call out Newt Gingrich for the “underlying suggestions” in his reference to Barack Obama as...