Mr Trump remained unconvinced the Iran agreement was anything but a "bad deal".
Foreign Minister Mohammad Javad Zarif has hailed talks between Iran and the European Union over salvaging the nuclear deal as a "good start".
The writer is Antigua and Barbuda's Ambassador to the United States and the Organization of American States. He has provided proximate proof that any deal the (US) makes, even a successful one, may be tossed aside on the whim of this or any other president.
The three European allies and Russian Federation are trying to keep the landmark 2015 accord alive in the wake of U.S. President Donald Trump's decision, pushing Moscow into rare cooperation with Europe.
Pompeo told Fox News on May 13 that Washington was ready to form a more wide-ranging Iran deal with its European partners "that achieves the outcomes that protect America". On Wednesday, Trump tweeted that the three Americans detained by Pyongyang had been released and were on their way home with Pompeo.
Others were dubious that withdrawing from the nuclear deal would prove effective, particularly since it shattered an global alliance that worked to negotiate the deal with Iran.
Despite the lack of support from other world powers, Bolton said he thought the US sanctions would make a dent in and of themselves. "The United States, and all of its GREAT people, should be very proud of what is now taking place in Korea!" he wrote.
"The advantages from the Iranians' point of view is that they should have some benefits from economic participation and economic engagement with us in the west". The conditions Washington has set for Tehran to meet are utterly unrealistic. North Korea, which is about to start negotiations on its nuclear programme with the USA, will now be much more skeptical about any possible agreement with Trump.
Iranian President Hassan Rouhani said on Sunday that Tehran would remain committed to its 2015 nuclear deal if its interests were protected. Among the adversely affected are European firms, whose dealings with Iran jacked up the value of EU-Iran trade from $9.2 billion in 2015 to $25 billion in 2017.
"One of the questions that we need to ask the Americans is whether their final objective is to make the Iranians yield on its nuclear programme or to get rid of the regime", said a senior French official, acknowledging that Paris was concerned by the ideological shift in Washington since John Bolton was appointed U.S. National Security Advisor.
Trump's tough line on Iran, of course, was intended for an audience beyond Tehran.
"The U.S.is the world's foremost power, and for the U". But the reach of the USA financial system, the dominance of the dollar and the presence of European companies' operations in the United States all weaken any potential EU measures. That warning could bring yet another ironic twist.
Iran has said it is preparing to resume "industrial-scale" uranium enrichment "without any restrictions" unless Europe can provide solid guarantees that it can maintain trade ties despite renewed U.S. sanctions.
However, Washington's decision to pull out of the worldwide nuclear deal and its threat to reimpose sanctions on firms doing business in Iran has cast fresh doubt over this new trade.
Maysam Behravesh is a PhD Candidate in the Department of Political Science and an Affiliated Researcher at the Center for Middle Eastern Studies, Lund University, Sweden.