A pair of hawkish, Trump-supporting Senate Republicans say that any ‘lasting’ Iran nuclear deal would need to be approved by Congress, ideally through a two-thirds majority treaty vote. But scoring a two-thirds majority in the Senate for treaty ratification would require Iran to fulfill a series of steep demands. In addition to getting rid of all of its enriched uranium and centrifuges, GOP lawmakers say it would need to dismantle its ballistic missile program and...