Shervin Pishevar, advisor to HRH Reza Pahlavi, analyzes President Trump's ultimatum to Iran to reopen the Strait of Hormuz. Pishevar praises Trump's "doctrine of preemption," arguing decisive action today prevents future threats from Iran's developing nuclear, drone, and ICBM programs. He criticizes past US administrations for "Chamberlaining" the Iranian regime.

President Donald Trump said the U.S. Navy will begin a blockade of the Strait of Hormuz and interdict vessels that have paid a toll to Iran, after U.S. peace talks with Tehran ended in a stalemate.

"Effective immediately, the United States Navy, the Finest in the World, will begin the process of BLOCKADING any and all ships trying to enter or leave the Strait of Hormuz," Trump posted on Truth Social. "At some point, we will reach an ‘ALL BEING ALLOWED TO GO IN, ALL BEING ALLOWED TO GO OUT’ basis, but Iran has not allowed that to happen… THIS IS WORLD EXTORTION."

He said the U.S. would deny safe passage to vessels that paid the toll and begin clearing mines.

"I have also instructed our Navy to seek and interdict every vessel in international waters that has paid a toll to Iran," he wrote. "No one who pays an illegal toll will have safe passage… We will also begin destroying the mines… Any Iranian who fires at us… will be BLOWN TO HELL!"

WHY THE STRAIT OF HORMUZ MATTERS AS TRUMP ISSUES FRESH ULTIMATUM TO IRAN

Iran’s closure of the strait has triggered global economic turmoil, and reopening it was a key condition in U.S. efforts to reach a deal.

In a second post, Trump reiterated the demand: "They better begin… getting this INTERNATIONAL WATERWAY OPEN AND FAST!"

A satellite image shows the Strait of Hormuz, a key maritime passage connecting the Persian Gulf to the Gulf of Oman, vital for global energy supply. (Amanda Macias/Fox News Digital)

Trump’s warning raises the stakes in the narrow but vital waterway, a critical artery for global energy supplies.

The strait, which lies between Iran, Oman and the United Arab Emirates, is one of the world’s most critical energy choke points, carrying roughly 20 million barrels of oil a day along with about one-fifth of global liquefied natural gas.

The strait is also a vital artery for refined fuels, including products like jet fuel.

The latest threat builds on a pattern of deadlines Trump has imposed on Tehran over the strait. Here is a timeline of those demands:

In a Truth Social post, Trump declared that if Iran did not "FULLY OPEN" the strait within 48 hours, the United States would "obliterate their various POWER PLANTS, STARTING WITH THE BIGGEST ONE FIRST!"

Ali Mousavi, Iran’s permanent representative to the International Maritime Organization, responded by saying that the Strait of Hormuz was "open to everyone" except Tehran's enemies. Meanwhile, other Iranian officials warned that attacks on energy infrastructure would amount to an attack on the Iranian people and would be met with retaliation.

SAN FRANCISCO BECOMES FIRST US CITY WHERE DIESEL PRICES TOP $8 A GALLON

Two days later, Trump wrote in a Truth Social post that the U.S. had had "productive" conversations with Iran and that he had ordered the Pentagon to delay any strikes on Iranian power plants and energy infrastructure for five days.

Iranian officials publicly denied that any talks were taking place.

Trump again extended his deadline — this time by 10 days, to April 6 at 8 p.m. Eastern — saying in a social media post that he was "pausing the period of Energy Plant destruction" at the Iranian government’s request.

WHERE GAS PRICES ARE RISING FASTEST AS TRUMP ISSUES FRESH WARNING TO IRAN

President Donald Trump called on the nations of the world to  summon some "delayed courage" and "just take" the Strait of Hormuz. (Alex Brandon/Pool via REUTERS; Benoit Tessier / Reuters)

Trump wrote in a Truth Social post that "great progress" had been made in negotiations to end the conflict. At the same time, he warned that if a deal was not reached and the Strait of Hormuz was not "immediately" opened, the United States would destroy Iran’s power plants, oil wells, Kharg Island — the country’s main oil export hub — and "possibly all" desalination plants.

Trump said Iran requested a ceasefire, a claim Iran’s foreign ministry spokesperson called "false and baseless," according to the state news agency IRIB.

In a social media post, Trump said the United States would consider a ceasefire only once the strait was "open, free and clear," adding: "Until then, we are blasting Iran into oblivion or, as they say, back to the Stone Ages!!!"

WHERE GAS PRICES ARE RISING FASTEST AS TRUMP ISSUES FRESH WARNING TO IRAN

Trump warned in a Truth Social post that "time is running out — 48 hours before all Hell will reign down on them." 

The post followed several conflicting statements in previous days, in which he alternately criticized allies for not acting to reopen the strait and suggested it would reopen on its own.

Cargo ships in the Gulf, near the Strait of Hormuz, as seen from northern Ras al-Khaimah, near the border with Oman’s Musandam governance, amid the U.S.-Israeli conflict with Iran, in United Arab Emirates, March 11, 2026. (REUTERS/Stringer/File Photo/File Photo)

In a profanity-laced post on Truth Social on Sunday, Trump wrote: "Tuesday will be Power Plant Day, and Bridge Day, all wrapped up in one, in Iran.

"There will be nothing like it!!! Open the F-----’ Strait, you crazy b-------, or you’ll be living in Hell - JUST WATCH! Praise be to Allah."

"Tuesday, 8:00 P.M. Eastern Time!" he wrote in a second post.

President Donald Trump speaks about the Iran war from the Cross Hall of the White House on Wednesday, April 1, 2026, in Washington. (Alex Brandon/AP)

Two days later, Trump issued a fresh ultimatum to Iran, demanding that it allow all vessels to transit the Strait of Hormuz or face strikes on critical infrastructure. The warning came after weeks of escalating threats and missed deadlines.

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"A whole civilization will die tonight, never to be brought back again. I don’t want that to happen, but it probably will," Trump wrote in a Truth Social post. "We will find out tonight — one of the most important moments in the long and complex history of the world," he added, referencing his 8 p.m. ET deadline for Iran to agree to a ceasefire and reopen the strait.

A ceasefire was called a few hours before the 8 p.m. deadline.

Amanda covers the intersection of business and politics for Fox News Digital.

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