Macron, who in recent weeks made a deliberately public effort to talk Trump around, said in an interview with German media that it was vital for the deal's other parties to reaffirm their commitment. Mr Rouhani shows no sign of being rattled by Mr Trump's move. Yet, not all analysts believe that if the USA walked away from the deal, oil prices would jump higher.
Trump's threats regarding the nuclear deal have influenced Iran to consider all possible outcomes, including a JCPOA without the US, but which might still include some European allies, China and Russian Federation.
Asserting that the deal has worked in rolling back Iran's nuclear programme, he said since its implementation, Tehran had destroyed the core of a reactor that could have produced weapons-grade plutonium; removed two-thirds of its centrifuges (over 13,000) and placed them under global monitoring; and eliminated 97 percent of its stockpile of enriched uranium.
Iranian state television did not broadcast Trump's announcement live, but carried his remarks in a crawl at the bottom of the screen and later recounted some of them. That conclusion - itself premature - has perhaps led him to hope he can unsettle the Iranians the same way, so that they will renegotiate the JCPOA into something closer to what the United States and Israel want. The nuclear deal gave Iran, the world's foremost state-sponsor of terrorism, a clear path to an atomic arsenal. Countries, not individuals within them, are expected to be true to their word.
2015 Iran nuclear deal
The release comes as the president continues to prepare for his upcoming summit with North Korean leader Kim Jong Un.
Bolton, speaking to "CBS This Morning" one day after President Trump announced his decision on the deal, says that the president's "Plan B" to the Obama-era deal is already being implemented in the form of putting "very strict US sanctions back into effect".
The Trump administration took issue with various aspects of the deal, including its failure to address Iran's ballistic missile program and the deal's sunset provision loosening restrictions in the next decade. Trump has repeatedly pointed to those omissions in referring to the accord as the "worst deal ever".
"From this moment, the JCPOA is between Iran and five countries", he said in a televised address.
He said the sanctions would target industries mentioned in the deal, including Iran's oil sector, aircraft manufacturers exporting to Iran and Iranian government attempts to buy U.S. dollar banknotes.
"If you don't succeed in obtaining a definitive guarantee - and I really doubt that you can - at that moment, we cannot continue like this", he said.
Already, the Iranian rial is trading on the black market at 66,000 to the dollar, despite a government-set rate of 42,000 rials. They also burned a piece of paper representing the nuclear deal and stomped on the papers' ashes.
"That'll have a significant ripple effect on Iran's economy". "We should not rely on the USA, nor on Europe".
"The first feeling I got, my family and I, was that we should not stay here anymore", said Katayoon Soltani, an accountant.