And Trump has done the same thing backing out. Plus he just killed a Boeing deal for 80 787's, and 100,000 jobs, that were to be sold to Iran. The U.S. can backout that's all well and good, but the U.S. credibility has been jeopardized in doing so. The rest of the Iran deal countries will continue to honor the agreement. Trump could have worked to strengthen the deal, instead of whining about it and walking away.