Iranian Deputy Foreign Minister Abbas Araqchi said during a speech at the Chatham House think tank in London that Tehran can not remain in the nuclear deal, known as the Joint Comprehensive Plan of Action, if it can not benefit from it.
"Any officials negotiating with the Europeans right now will get a much more aggressive set of requirements from Pompeo", said Richard Nephew, a former White House and State Department official who worked on Iran during the Obama administration.
Earlier that month, Trump announced he would waive the sanctions on Iran as required by the nuclear agreement but for the last time. US sanctions will resume unless Trump issues fresh "waivers" to suspend them on May 12.
Trump sees three defects in the deal: its failure to address Iran's ballistic missile program; the terms under which global inspectors can visit suspect Iranian nuclear sites; and "sunset" clauses under which limits on the Iranian nuclear program start to expire after 10 years.
Iran, the five permanent members of the UN Security Council - the U.S., UK, France, Russia, and China - Germany and the European Union struck the nuclear deal on July 14, 2015. He wants all three strengthened if the United States is to stay in the deal.
President Trump has opposed the deal from the start, and is demanding broad changes to the already negotiated pact.
"The North Koreans will wonder about whether one can have credible negotiations with the United States", said a former senior USA official. "He is what matters here".
"Pompeo was a hawk on Iran".
Talking to reporters Tuesday about his decision, Trump cited his disagreement with Tillerson over the Iran nuclear agreement as an example of how the outgoing secretary of state had "a different mindset" than his own. "However, my understanding is he doesn't want the deal to disappear", said a former senior USA official.
The head of U.S. Central Command, U.S. Army Gen. Joseph Votel, who oversees American forces in the Middle East, warned lawmakers on Tuesday about the consequences of the agreement unraveling. What if Iran becomes a party to that war more directly and overtly rather than clandestinely or covertly, and that becomes a conflict that doesn't just embroil Israel and potentially us by extension but also many of our other allies in the region? "So we were not really thinking the same", Trump said before departing for California.
Iran, of course, doesn't have a nuclear weapons program, and didn't have such a program for years before the deal was made. "Hopefully, he'll have the mandate that Tillerson didn't have".