There would be a myriad of ramifications if the US was to back out of the Iranian Nuclear Agreement. From Muhammad Sahimi and Katariina Simonen at antiwar.com:
During his campaign for presidency, Donald Trump referred repeatedly to the nuclear accord with Iran, officially known as the Joint Comprehensive Plan of Action (JCPOA), as a “horrible agreement,” one that would lead to “a nuclear Holocaust,” and so bad that “it is suspicious.” He repeatedly and falsely claimed that the United States has given Iran $150 billion, whereas in reality Iran will receive only about $55 billion. Regardless of the amount, however, what Iran will eventually receive is its own money that had been held up in frozen accounts with European and Asian Banks as a result of the U.S. sanctions imposed on Iran.
Trump also promised repeatedly that, if elected, he will tear up the JCPOA. He told the American Israel Public Affairs Committee’s conference earlier year that his first priority after he is elected would be to “dismantle” the agreement.
So, the question is, now that Trump President-Elect, will he tear up the nuclear deal with Iran? More importantly, can he actually do that if he wants to stay within the international norms and laws? And, assuming that he will deliver on his promise, what will be the consequences for the United States, its European allies, the Middle East, and especially Iran? Before addressing these important questions, it is important to discuss an important aspect of the JCPOA that has not been discussed previously.
To continue reading: Trump and the Nuclear Agreement With Iran