Key Facts Trump said Iran faces its final opportunity to reach an agreement before the United States considers devastating additional military action. Iran appears to be using threats against shipping and regional infrastructure to gain leverage while publicly denying direct negotiations with Washington. Tehran maintained that it was negotiating with Oman over maritime security rather than holding direct talks with the United States. Trump said the United States would not permit Iran to dictate passage through the region. Iran Tests American ResolveGulf officials believe Iran is pursuing a calculated strategy of escalation.