Sunday, professor Louis Henry Gates retreated from his threat to sue Sgt. James Crowley. Friday, President Obama retreated from his charge that the Cambridge cops “acted stupidly.” As Crowley has not budged an inch—his arrest of Gates was correct, and there will be no apology—there is no doubt who won this face-off. Game, set, match, Crowley and the Cambridge cops. It is, indeed, as Obama said Friday, a “teachable moment.” And those most in need of teaching are the professor, the governor of Massachusetts and President Obama. By charging or suggesting ...