White House Deputy Chief of Staff for Policy Stephen Miller stating in an interview with Fox News that US President Trump is directly involved in negotiations with Iran

Says:

• He's directly and personally involved in the negotiations, making sure that the results are up to his standards.
• Miller added that there's no deal until there's a deal. Nothing is final until it's final. And President Trump has been clear that he reserves the option now or at any time in the future to do whatever is necessary to defend and protect America's national security.