Nations were poised to approve the first fee on pollution from ships. That’s when the Trump administration began the threats.More than 100 nations were poised last month to approve a historic deal to slash pollution from cargo ships. That’s when the United States launched a pressure campaign that officials around the world have called extraordinary, even by the standards of the Trump administration’s combativeness, according to nine diplomats on its receiving end. An ambassador from Asia was told that, if he voted in favor of the plan, his country’s sailors would no longer be allowed to disembark at American ports....