The current furor over President Obama’s broken “keep your plan” promise confusingly melds together two very different claims. The first is a simple question of accuracy and honesty: Obama made a promise about his legislation, the promise has not come true, and a certain level of abuse is deserved. (Karl Rove huffs, “This is a serious breach of trust with the American people.” And you know that Karl Rove takes breaches of presidential trust with the utmost seriousness.) The justifiable scrutiny of Obama’s veracity has melded seamlessly into a second and very different claim: That Obama’s broken promise is not...