"The supreme leader’s position is that he “will consider further negotiations” only when the United States resumes complying with the terms of the nuclear deal, Seyed Hossein Mousavian, a spokesman for Iranian nuclear negotiators in the mid-2000s, told us. “By destroying the deal, Trump destroyed confidence and any chance for future negotiations,” said Mousavian, now a Middle East security and nuclear-policy specialist at Princeton’s Program on Science and Global Security." — source