White House envoy Steve Witkoff told a private gathering on Tuesday that the Trump administration is demanding that Iran agree any future nuclear deal will remain in effect indefinitely, according to a U.S. official and two other sources with knowledge of his remarks. Why it matters: President Trump and other critics of the 2015 Iran nuclear deal negotiated by the Obama administration seized on the "sunset provisions" as one of its main flaws. Witkoff made the comments two days before the next r...