Michael O'Hanlon, director of foreign policy research at the Brookings Institution, provides insight. In particular there is sympathy with the USA push to end the deal's "sunset clauses", which phase out restrictions on Iranian activities in the next decade.
By law there are several important decisions President Trump must make in the next few days regarding the 2015 agreement, which lifted worldwide economic sanctions on Iran in return for inspections and limits on nuclear facilities, in an effort to prevent the Islamic Republic from developing nuclear weapons.
President Trump, who has called the Iran deal "a total and complete catastrophe" must decide by mid-January whether to continue waiving US sanctions on Iran's oil exports under the terms of the pact.
Mr Johnson also raised the continued incarceration of the British-Iranian charity worker Nazanin Zaghari-Ratcliffe, as well as other dual-national consular cases and the treatment of workers with the BBC Persian service with Mr Tehran's Mohammad Javad Zarif.
President Hassan Rouhani's deputy chief of staff for political affairs Majid Takht-Ravanchi also warned the United States that the rogue nation had put together a contingency plan in the event that President Trump did not certify the deal and attempted to end it, one which would allegedly "surprise" Washington. That has not changed.
By thus "decertifying" the arrangement, he opened a window for Congress to reimpose sanctions, but to date, it has not done so - leaving the issue of the waivers.
In a Washington Post op-ed published last Thursday berating the Obama administration for its handling of Iran, Vice President Mike Pence said that additional actions definitely were an option, given the latest protests. "If Trump unilaterally reimposes all the nuclear sanctions, it will allow the Iranian regime to blame the USA for the regime's failures to address the grievances of those who are marching in the streets". Still, he has so far stopped short of withdrawing the United States from the accord. Mr Straw detected a "pretty high degree of questioning about where Iran goes", he told the Guardian newspaper.
"These sanctions target key entities involved in Iran's ballistic missile program, which the Iranian regime prioritizes over the economic well-being of the Iranian people", Treasury Secretary Steven Mnuchin said. The demonstrators denounced a lack of firmness by the European Union on Iran at a time when the country is experiencing a climate of tension and crackdowns on demonstrations.
Then-President Barack Obama made it perfectly clear his sympathies were not with the demonstrators.
The US president is expected to continue to waive the sanctions, as allies hope he will, but could also bring in new financial punishments targeting Iran's military.
"The economy in Iran is abysmal, and USA sanctions have contributed to that", he said. EIKO allows Khameini to enrich himself grotesquely.
Any U.S. disruption to the deal could shake oil markets, according to a report by Citigroup's global commodities team published Tuesday.
They are expected to advise that the US remain part of the nuclear agreement. "Economic pressure is painful for the Iranian people, but it's the right thing to do". "This global consensus must be translated into action ... the worldwide community needs to stand against any anti-JCPOA move by the USA if it wants to maintain the nuclear deal". At that point, stronger measures remain available. However, two other USA sources told AFP that Trump had not yet made a decision.
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