According to a U.S. official and two other sources, U.S. Special Envoy Witkov said at a private gathering on Tuesday that the Donald Trump administration has demanded that Iran agree that any future nuclear deal remain in effect indefinitely.Under the 2015 agreement, which was later Donald Trump scrapped, most restrictions on Iran’s nuclear program were set to expire gradually between eight and 25 years after signing.Eliminating such “sunset clauses” would strengthen the agreement and make it easier for Donald Trump to market it domestically as an upgrade to Obama’s policy. Witkov said, “Our premise in negotiating with the Iranians is that there are no sunset clauses. Whether or not an agreement is reached, our premise is: you must abide by the rules for the rest of your lives.”” Witkov also noted that while current U.S.-Iran negotiations are focused on nuclear issues, if an agreement is reached, the Donald Trump administration hopes to hold follow-up negotiations regarding Iran’s missile program and its support for proxy militant groups. At that time, the U.S. hopes other countries in the region will also participate in the negotiations.Witkov said that in the current nuclear negotiations, two key issues are Iran’s uranium enrichment capacity and the handling of its existing stockpile of enriched uranium. (Axios)