To thwart Donald Trump is to court punishment. A rival politician can expect an investigation, an aggravating network may face a lawsuit, a left-leaning university can bid farewell to its public grants, a scrupulous civil servant can count on a pink slip and an independent-minded foreign government, however determined an adversary or stalwart an ally, invites tariffs. Perceived antagonists should also brace for a hail of insults, a lesson in public humiliation to potential transgressors.