When Donald Trump won 20 of Iowa’s 40 nominating delegates — 20 of the 2,429 who will be allocated nationally; 20 of the 1,215 needed to be nominated — he declared the game over. Enlarging his emotional repertoire — leavening a barrel of petulance with a pinch of synthetic magnanimity — he said it is “time now for everybody, our country, to come together.” Presumably, he was not inviting to this group hug those Americans he calls “vermin.”