Secretary Tillerson followed these remarks by saying that the Trump administration will not "pass the buck" of a nuclear Iran to the next administration.
Now, Trump is trying to pick a fight with Iran even after admitting the Obama-era agreement is preventing the country from acquiring a nuclear weapon.
Tillerson said the review would not only look at Iran's compliance with the 2015 nuclear deal but also its behaviour in the region which he said undermined USA interests in Syria, Iraq, Yemen and Lebanon.
Even though Trump renewed the deal he heavily criticized, it is under review. They note that the U.S. is making these moves in the lead up to a quarterly global meeting in Austria to review the deal. The tough talk is a smokescreen to allow him to stick with the deal. "We could be wrong".
In January - a year on from the deal coming into force - Mr Obama noted that, as promised, Iran had reduced its uranium stockpile by 98 percent.
The review was to determine "where Iran is in compliance with the (nuclear) deal" and "to make recommendations to the president on the path forward", Spicer said. "None of the other countries would be up for that".More news: Aaron Hernandez's family to donate his brain for CTE research
In response, North Korea said it would test missiles on a weekly basis, and warned of "all-out war" if the United States took military action. That could mean Trump is looking for other ways to pressure Iran. "It's not clear we've achieved that result, and the economic relief they've received has been used on weapons systems and support for terrorism". Trump as a presidential candidate vowed to rip up the deal or renegotiate it, but hasn't said since taking office exactly how he'll proceed.
So what do you think about Donald Trump's decision on the Nuclear deal?
Tillerson said the USA is conducting a comprehensive review of its Iran policy and added that the Obama-era nuclear deal only "delays" Tehran's goal of becoming a nuclear state.
What is the United States doing about Iran?
Like the diplomats, Kirby said the administration may be looking for political cover.
Obama, Kerry and others who negotiated the deal strenuously defended its terms and said the agreement made the world a safer place.More news: Republicans float health care compromise ahead of Trump's 100-day mark
In the redesign, the heavy water reactor will be reconfigured so it can not yield fissile plutonium usable in a nuclear bomb.
The White House has imposed new Iran sanctions that targets more than two dozen individuals and businesses.
According to him, Iran continues to support the brutal Assad regime in Syria, prolonging a conflict that has killed approximately half a million Syrians and displaced millions more.
But Majidyar argued that scrapping the deal wouldn't help Washington. The United States is keen to avoid a second piece of evidence that strategic patience is a failed approach.
The International Atomic Energy Agency is in charge of monitoring the implementation of the agreement, and a joint commission set up between Iran and the group of six world powers has been established to address any issues that come up.More news: Fox News fires Bill O'Reilly after sexual harassment accusations
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