The Panama Papers—the massive collection of leaked documents from Mossack Fonseca, a Panamanian law firm that helps set up offshore shell corporations—have already had political consequences. Iceland’s prime minister, Sigmundur David Gunnlaugsson, resigned after the leak revealed that he had partly owned an offshore firm. David Cameron, the British prime minister, is facing criticism over ...

Last week, U.S. Secretary of State Mike Pompeo complained about Republicans in Congress who were grandstanding for harsher sanctions on Iran. Now, he has joined the grandstanders, announcing that the Trump administration is stepping up its maximum pressure campaign against Iran by ending waivers that had allowed some states to import Iranian crude oil. This ...