Trump warns Iran publicly

Donald Trump publicly warned Iran on April 9 that it had “better stop now” if it was charging tankers to pass through the Strait of Hormuz, putting fresh pressure on Tehran less than two days after a two-week ceasefire was announced. (reuters.com) The warning was not about a random shipping lane. The Strait of Hormuz is the only sea exit for the Persian Gulf, and the International Energy Agency says about 20 million barrels a day of oil and oil products moved through it in 2025. (iea.org) At the strait’s narrowest point, the water is only 29 nautical miles wide, and the actual navigable channels are about 2 miles wide in each direction with a 2-mile buffer zone. That means even small disruptions can jam a route used by some of the world’s biggest tankers. (iea.org) The United States Energy Information Administration says flows through Hormuz in 2024 and early 2025 equaled about one-fifth of global petroleum liquids consumption and about one-fifth of global liquefied natural gas trade. Qatar’s liquefied natural gas exports are especially exposed to that route. (eia.gov) That is why a “fee” here is not just a port charge. A toll at Hormuz would amount to charging the world for access to a maritime chokepoint that international shipping treats as a transit corridor, not a private gate. (rferl.org) Reuters reported that Trump’s post came after reports Iran was charging or preparing to charge ships crossing the strait, while White House press secretary Karoline Leavitt had already said the president expected the waterway to reopen “immediately, quickly and safely.” (reuters.com) (cnbc.com) Shipping had not bounced back even after the ceasefire. CNBC reported on April 8 that MarineTraffic data showed only limited movement, including at least two bulk carriers, while oil tanker traffic remained far from normal. (cnbc.com) That helps explain why Trump used a public threat instead of waiting for quiet diplomacy. If insurers, shipowners, and oil buyers think passage depends on paying Tehran, they price in risk immediately, and the cost shows up in freight rates and energy markets before many ships even move. (reuters.com) (iea.org) The legal fight is part of the story too. Reporting on April 11 said maritime lawyers and industry officials were pointing to the United Nations Convention on the Law of the Sea, especially transit-passage rules, as a reason Iran would struggle to justify tolls on through traffic. (business-standard.com) So the message in Trump’s post was narrower than a war threat but sharper than a diplomatic note. Keep the ceasefire if you want, it said, but don’t turn the world’s busiest oil chokepoint into a cash register. (reuters.com)