WASHINGTON — On Thursday morning, Washington time, a senior Iranian official wrote on social platform X that the country’s fighters were hiding in sea caves near the Strait of Hormuz, preparing to “devastate the aggressors.”Eighteen minutes later, President Trump posted on Truth Social: “I have ordered the United States Navy to shoot and kill any boat” that is “putting mines in the waters of the Strait of Hormuz.”Trump’s war on Iran, interrupted by a cease-fire that he extended indefinitely this week, has morphed from all-out bombardment to a volatile, costly standoff at the mouth of the Persian Gulf.Neither side appears...