Many worry that Donald Trump’s tweets might inflame the North Korea conflict. Maybe his critics should step back with renewed admiration for the man and his subtle arts. Just notice how thoroughly his tweets have reduced the mighty NFL to impotence.

Indeed, a bystander wonders with what whimsical malice this aged man-child, blessed with superpowers, decided the league should be the newest target to be emasculated and confounded by his 140-character missiles.

Actually...