Donald Trump was so awful, so horrible, so disgusting in the latest Republican debate — his lies, his distortions, his deceits, and his libels thicker and fouler than they’ve yet been—that he’s done us all a favor. If he wins easily in South Carolina after his monstrous turn, he’ll be going straight to the Republican nomination. Such a victory in a classically conservative state like South Carolina after his romp in idiosyncratic New Hampshire will prove Trump’s repellent personality is the real key to his success. You want me to delineate his dishonesties? That would be like asking me to...