President Donald Trump is insisting a deal over the Strait of Hormuz is imminent. But a former U.S. diplomat says any agreement involving Iran is unlikely to deliver the political win the president is hoping for. Vessels in the Strait of Hormuz, a vital waterway through which about a fifth of global oil supplies normally flow. “Trump’s challenge is not just how to fight the war, which seems to have stumped him, but how to explain this deal,” Ratney said. “As President Trump has stated, the Strait of Hormuz is completely controlled by the United States Navy and our blockade,” said Kelly.