"In an October 13, 2017, announcement of a new U.S. strategy on Iran, President Donald Trump asserted that the 2015 multilateral nuclear agreement with Iran, the Joint Comprehensive Plan of Action (JCPOA), does not address the full range of potential threats posed by Iran, or permanently ensure that Iran cannot develop a nuclear weapon. Trump asserted that, by supporting terrorist groups in the Middle East region and furthering its ballistic missile program, 'Iran is not living up to the spirit of the deal.' The President also announced that he would not certify to Congress under the Iran Nuclear Agreement Review Act (INARA, P.L. 114-17) that continued U.S. sanctions relief to Iran under the JCPOA is 'appropriate and proportionate' to the measures taken by Iran to terminate its illicit nuclear program."
CRS Report for Congress, R44942