"But there's a chance that if they don't make a deal, that I will do secondary tariffs on them like I did four years ago," Trump also said President Donald Trump issued a warning to Iran if it fails to reach an agreement with the U.S. regarding its nuclear program. I "If they don't make a deal, there will be bombing," he said on Sunday during an interview with NBC News. He also signaled he would take further economic measures if necessary. "But there's a chance that if they don't make a deal, that I will do secondary tariffs on...