US Enforces Full Blockade on Iranian Ports, Halting All Seaborne Trade

The United States has fully enforced a naval blockade of Iran, stopping all maritime trade in and out of the country in less than two days, even as President Donald Trump signaled that negotiations to end the conflict could resume within 48 hours. The move, confirmed by U.S. Central Command late Tuesday, comes during a fragile two-week ceasefire scheduled to expire April 21 and follows the collapse of weekend talks in Pakistan.

Admiral Brad Cooper, commander of Central Command, said more than 10,000 American sailors, Marines, and Air Force personnel, backed by 12 warships, over 100 aircraft, and extensive surveillance, have imposed what he described as total maritime superiority along Iran’s southern coast. The operation covers ports on both the Persian Gulf and the Gulf of Oman, effectively controlling access through the Strait of Hormuz. In the first 36 hours, six merchant vessels turned back under U.S. orders, and a U.S. destroyer intercepted two oil tankers that had departed Chabahar port. A Chinese-owned tanker under U.S. sanctions was also reportedly turned away.

Ninety percent of Iran’s economy relies on seaborne trade. The speed and completeness of the shutdown have few recent parallels in modern warfare. Oil prices, which spiked above $104 a barrel in recent days amid fears of prolonged disruption, eased somewhat Wednesday on reports that talks might restart. Yet the blockade’s breadth raises immediate questions about its strategic purpose: whether it is intended as temporary leverage to force concessions or as a long-term instrument of economic pressure that could complicate diplomacy.

Trump, speaking to reporters, struck an optimistic tone. He told ABC’s Jonathan Karl that negotiations between American and Iranian officials could resume in Pakistan “in the next two days” and that he did not expect to extend the ceasefire beyond its current deadline. “It could end either way, but I think a deal is preferable because then they can rebuild,” Trump said. “They really do have a different regime now. No matter what, we took out the radicals.” Vice President JD Vance, who led the American delegation in the first round of talks over the weekend, echoed that the United States had shown flexibility while suggesting Tehran had not yet met core demands, chiefly a verifiable commitment to forgo nuclear weapons.

Pakistani, Iranian, and Gulf officials confirmed that negotiating teams may return to Islamabad later this week, though one senior Iranian source told Reuters no firm date had been set. The diplomatic channel, facilitated by Pakistan, represents the first direct high-level contact between Washington and Tehran in nearly 50 years. Its continuation amid active military operations underscores the contradictory currents running through American policy.

Critics from various ideological vantage points see danger in the gap between rhetoric and action. The blockade risks inflaming nationalist sentiment inside Iran, where economic suffocation could harden rather than soften negotiating positions. It also places enormous stress on global energy markets at a moment when many economies remain sensitive to price shocks. A prolonged closure of the Strait of Hormuz, through which roughly one-fifth of the world’s oil supply normally passes, would carry consequences far beyond the Persian Gulf.

The operation draws on historical precedent. Reagan administration officials faced similar choices during the 1980s Tanker War, ultimately using decisive naval force to help bring Iran to the negotiating table. Yet today’s context differs in important respects. The U.S. military has been engaged in nearly continuous operations across the Middle East for decades, and the current confrontation follows a month of direct American and Israeli strikes that damaged Iranian military capacity but left its political system intact. Questions persist about whether the “radicals” Trump believes have been removed have in fact been replaced by a leadership more amenable to American terms.

The New Republic and other outlets have framed the blockade as part of a broader pattern in which the Trump administration treats multiple adversaries—Iran, Venezuela, and others—through the lens of maximum pressure rather than coherent strategy. Skeptics argue this approach substitutes unilateral force for the patient diplomacy required to resolve entrenched conflicts. Others, writing in conservative publications, urge the administration to recognize limits: Iran cannot be compelled to accept every American demand, and genuine peace may require mutual concessions on nuclear issues, regional proxies, and sanctions relief.

For now, the blockade is being applied impartially to vessels of all nations, according to Central Command. That includes ships from countries that have not joined the United States in its campaign against Iran. The result is a de facto quarantine whose enforcement will test not only Iranian resilience but the willingness of China, Russia, and European nations to accept American writ over global shipping lanes.

The coming days will reveal whether the military pressure creates the conditions for a breakthrough in Pakistan or whether it closes the narrow diplomatic opening that regional actors have tried to preserve. Trump has repeatedly said he prefers a deal that allows Iran to rebuild under new leadership. Whether the blockade serves that goal or undermines it remains the central uncertainty as the ceasefire clock runs down. The administration’s ability to thread the needle between coercion and negotiation will shape not only the immediate future of the Middle East but the credibility of American power in an era when rivals increasingly question Washington’s capacity to deliver both stability and dominance.