After 21 hours of marathon negotiations ended without agreement, U.S. Vice President JD Vance departed Pakistan, marking the collapse of the highest-level direct talks between Washington and Tehran since Iran's 1979 Islamic Revolution. The two sides left with irreconcilable positions. President Donald Trump then announced that, effective 10:00 a.m. Eastern Time on April 13, the U.S. Navy would impose a full blockade of Iranian ports and coastlines — sending fresh shockwaves through global energy markets.
U.S.-Iran Talks: No Common Ground
With both delegations arriving in Pakistan holding non-negotiable positions, analysts say the talks were structurally predisposed to fail. Fox News reported that Vance described Washington's offer as the "final and best terms," laying out six American red lines: a complete halt to uranium enrichment; dismantlement of all major nuclear facilities; surrender of highly enriched uranium; acceptance of a broad regional peace and de-escalation framework including regional allies; termination of funding to proxy groups including Hamas, Hezbollah, and the Houthis; and full, toll-free access through the Strait of Hormuz.
Those six conditions were entirely at odds with Iran's ten-point counterdemand. The Iranian delegation — led by Parliament Speaker Mohammad Bagher Qalibaf and Foreign Minister Abbas Araghchi — had also tabled four non-negotiable preconditions before talks began: full Iranian sovereignty over the Strait of Hormuz; full U.S. war reparations; unconditional release of frozen Iranian assets abroad; and a lasting ceasefire across the wider West Asia region.
After talks broke down, both sides moved quickly to assign blame. Araghchi accused Washington of "maximum pressure and moving the goalposts at will," saying Iran had entered the most intensive high-level engagement in 47 years in good faith — coming within inches of an "Islamabad Memorandum of Understanding" — only to face unreasonable U.S. demands. Speaker Qalibaf said the U.S. delegation had failed to earn Iran's trust, warning bluntly: "Pretty soon you'll start missing four-to-five-dollar-a-gallon gasoline."
At a press conference before leaving Pakistan, Vance said Washington had drawn its lines clearly and that Iran had "chosen not to accept our terms," adding that the breakdown was "much worse news for Iran than it is for the United States." Fox News reported that after Vance's departure, U.S. envoy Steve Witkoff and Trump's son-in-law Jared Kushner also left Islamabad on April 12, completing the full U.S. withdrawal from the negotiations.
Trump's reaction to the breakdown was immediate and escalatory. Via his Truth Social platform and a Fox News interview, he announced that the U.S. Navy would intercept all vessels attempting to transit the Strait of Hormuz, with "search and seizure" operations targeting any ship that had paid tolls to Iran. Trump's language was stark: any Iranian forces firing on U.S. military or commercial vessels would be "BLOWN TO HELL."
U.S. Central Command issued a formal statement confirming the blockade would take effect at 10:00 a.m. Eastern Time on April 13, targeting all maritime traffic to and from Iranian ports and coastlines. The New York Times noted that Central Command appeared to modulate Trump's "full blockade" framing, clarifying that the U.S. would "not impede freedom of navigation through the Strait of Hormuz for vessels not bound for Iranian ports." Acting Deputy Attorney General Todd Blanche separately said the Justice Department would aggressively prosecute anyone buying or selling sanctioned Iranian oil.
Whether the blockade is operationally sustainable is contested. The Wall Street Journal noted that maintaining a prolonged blockade across one of the world's most strategically sensitive chokepoints is far more complex than a social media announcement. Bryan Clark, a retired naval officer and senior fellow at the Heritage Foundation, assessed that U.S. forces deployed in the region have the capability to enforce the blockade — but warned that if Iran begins firing on American personnel or systems, the operational burden rises sharply as forces must simultaneously protect their own assets.
Mark Montgomery, a retired rear admiral and senior fellow at the Foundation for Defense of Democracies (FDD), told the Wall Street Journal the mission is militarily manageable. He argued the U.S. does not need to stop every vessel — only enough to deter Iran's shadow oil fleet and substantially increase Tehran's economic pressure. "I don't think the U.S. can do this alone," Montgomery added.
Trump claimed "many countries" would assist in enforcing the blockade and told Fox News that Britain, among others, was sending minesweepers in support. But the composition of any coalition remains unclear. Sources told Bloomberg that the United Kingdom would not participate in the blockade. Although Britain has deployed autonomous mine-hunting drones to the region, officials indicated London would only commit them to the Strait of Hormuz as part of a credible, jointly planned reopening strategy — a fundamentally different mission from the blockade Trump has announced. The White House reiterated to the Wall Street Journal that the U.S. Navy has sufficient resources to sustain the operation.
Why Is Trump Doing This?
Iran's earlier closure of the Strait — a retaliatory measure following U.S. and Israeli strikes — had already drawn international condemnation and calls for Tehran to reopen the waterway. Iran had sporadically permitted certain cargo and tanker vessels to pass, and on April 7 briefly agreed to a two-week opening as part of a ceasefire understanding. With Israel declining to honor the ceasefire and the U.S. lamenting the absence of a peace deal, it is now Washington that has announced a "total blockade" of the Strait — and threatened that any vessel that has paid Iran a transit fee "will not be safe on the open seas."
Trump's escalation defies conventional diplomatic logic and implicates the interests of the international community broadly. Bloomberg warned the move could intensify global oil and fuel shortages. In Trump's own framing, the blockade is ultimately intended to restore unimpeded access to the Strait. He told Fox News: "It's called all in and all out — someday all nations will come in and all will go out, not by percentage, not by ally or friend, just all in and all out."
Trump argued the approach would sever Iran's economic lifeline entirely. Former U.S. diplomat and Middle East envoy Dennis Ross told Bloomberg that a blockade carries lower risk than seizing Iran's key oil export hub, Kharg Island: "For Iran, Kharg Island is something they have to defend. We could take it, but then our forces would be very exposed. This is much smarter than taking Kharg Island." Clayton Seigle, a senior fellow at the Center for Strategic and International Studies (CSIS), noted that impounded oil cargoes could be sold on international markets by commodity trading firms, ensuring Tehran receives no benefit.
The decision represents a sharp reversal of Washington's own recent policy. Last month, the U.S. issued a sanctions waiver authorizing the sale of some Iranian crude — a step widely seen as easing supply concerns. Bloomberg noted that even a blockade lasting only until that waiver expires on April 19 could meaningfully reduce global supply. Brett Erickson, CEO of Obsidian Risk Advisors, said: "The world is facing a genuine energy crisis right now, and Washington's response is completely disconnected." He added: "The Trump administration has backed itself into a corner where the only way out is either to harm our Asian allies or to allow Iran to loot the global energy market."
According to preliminary tanker-tracking data compiled by Bloomberg, Iran exported approximately 1.7 million barrels per day of crude oil and condensate in March — a figure that already exceeds neighboring Iraq's pre-war export levels.
Mines, Fast Boats, and Iran's Asymmetric Options
The most significant operational variable in any blockade scenario is Iran's long-developed asymmetric warfare capability. The Wall Street Journal noted that the Strait of Hormuz runs directly along Iran's coastline, leaving U.S. forces exposed to mines, drones, and fast-attack boats. Although Trump has repeatedly claimed that U.S. strikes have "destroyed" Iranian military capacity — asserting the country has "no navy, no air force, and no functioning air-defense radar" — analysts dispute that assessment. Farzin Nadimi, a researcher at The Washington Institute for Near East Policy, estimated that more than 60 percent of the Islamic Revolutionary Guard Corps' fast-boat fleet, which controls access to the Strait, remains intact.
The mine threat is a particular concern. Multiple U.S. officials confirmed to Fox News that Iran has already laid mines in the Strait of Hormuz. Trump himself acknowledged in the Fox interview that the U.S. has deployed advanced minesweepers and would begin large-scale mine-clearing operations within days. Former Navy explosive ordnance disposal officer Tom Sauer told Fox that clearing underwater mines is a high-risk operation that could take several days. The Islamic Revolutionary Guard Corps warned that any warship approaching the Strait of Hormuz would be regarded as a violation of the ceasefire agreement and would face "decisive and severe" consequences.
Defense Secretary Pete Hegseth has repeatedly asserted that Iran's new Supreme Leader, Mojtaba Khamenei, has been seriously wounded and that the Iranian regime has "no options left and no time remaining." Reuters, however, cited sources indicating that the new Supreme Leader, despite his injuries, remains "mentally sharp" and has continued directing the Pakistani negotiations from behind the scenes. Supreme Leader adviser Ali Akbar Velayati said the "keys to the Strait" remain firmly in Iranian hands. A separate senior adviser warned that Iran retains "vast and untapped leverage" to counter a naval blockade, and that Tehran would not be pressured by "tweets and fictional plans."
The Global Economy, Caught in the Crossfire
Rachel Ziemba of the Center for a New American Security said the window for global economic stabilization — to the extent it ever existed — has now closed. "Iran is betting it can outlast the U.S. and the global economy," Ziemba said, adding: "I don't think the rest of the world is ready for the reality of this war of attrition. We have already seen the pain and the disruption."
The Wall Street Journal reported that shipping through the Strait has collapsed since the outbreak of the U.S.-Iran conflict. Only four vessels transited the waterway in the prior 24 hours — compared with a pre-war average of approximately 138 ships per day.
Oil market researcher Rory Johnston told the Wall Street Journal that the conflict has already cut off roughly 13 million barrels per day of Persian Gulf crude output — equivalent to 12 percent of global supply. A successful U.S. blockade of Iranian oil exports would remove an additional approximately 2 million barrels per day from global markets. Oil prices have already surged more than 50 percent since the conflict began. Asian factories have been forced to cut output to conserve energy, some filling stations have implemented fuel rationing, and certain airports are facing acute jet fuel shortages, the Wall Street Journal reported.
Gulf states have absorbed severe economic damage. Capital Economics analysts forecast that Qatar's GDP will contract by 13 percent this year, the United Arab Emirates by 8 percent, and Saudi Arabia by 6.6 percent — an economic shock that analysts say could surpass the impact of the COVID-19 pandemic on the region. Even Trump acknowledged in his Fox interview that energy prices are unlikely to fall in the near term and may still be higher by autumn.
When asked directly whether oil prices would decline, Trump said: "I hope so. I mean, I think so. It might be — or a little higher. Should be about the same. I don't think it'll last that long." The prospect of sustained higher prices has ignited a domestic political dispute in the United States. American Petroleum Institute president Mike Sommers sharply criticized Democratic Representative Ro Khanna for attributing high gasoline prices to "Trump's war," arguing instead that Democratic pressure on energy producers to halt domestic oil and gas production — combined with state-level high taxes, carbon trading schemes, and refinery restrictions — was the primary driver of rising prices.
Regardless of where political responsibility lies, international oil prices surged above $100 per barrel following the breakdown of talks and Trump's blockade announcement. As of 23:10 GMT on April 12, Brent crude futures were up $7.60, or 7.98 percent, at $102.80 per barrel. West Texas Intermediate was trading at $104.88 per barrel, up $8.31 or 8.61 percent. Saul Kavonic, head of energy research at MST Marquee, told Reuters: "Markets have essentially reverted to pre-ceasefire levels — except now the U.S. is also moving to block up to an additional 2 million barrels per day of Iran-related crude from passing through the Strait of Hormuz."
The only piece of positive news for oil markets over the past two days came on April 12, when Saudi Arabia announced that the full pumping capacity of its East-West Pipeline had been fully restored, with throughput running at approximately 7 million barrels per day.
Expanding Conflict and Humanitarian Costs
While U.S.-Iran negotiations were underway, the Israel Defense Forces continued military operations in southern Lebanon. Prime Minister Benjamin Netanyahu visited frontline troops over the weekend. The IDF issued a statement claiming it had uncovered a Hezbollah weapons cache inside a hospital in Bint Jbeil, accusing Hezbollah of a serious violation of international law by militarizing medical facilities. Israeli Ambassador to the United Nations Danny Danon told Fox News that Iran must now face "the test of reality" following the collapse of talks.
Lebanese Prime Minister Nawaf Salam reaffirmed in a televised address that his government remains committed to ending the war through negotiations and to securing a full Israeli military withdrawal from Lebanese territory. Israeli and Lebanese ambassadors to the United States are expected to hold direct talks in Washington next week. Pakistan's Foreign Ministry issued a statement urging both the U.S. and Iran to maintain their ceasefire commitments and expressing Islamabad's continued willingness to facilitate mediation.
The human cost of the conflict continues to mount. The New York Times reported that at least 1,701 civilians have been killed inside Iran, including 254 children — figures current as of March 8, 2026.
Lebanon's Health Ministry reported on Saturday that 2,020 people have been killed in Lebanon during the latest wave of hostilities, with at least 32 deaths recorded in Gulf states. On the Israeli side, 22 people have been killed, along with 12 soldiers in Lebanon. Thirteen U.S. military personnel have died in the Middle East theater.
Confronting the escalating casualties and expanding conflict, Pope Leo XIV issued an urgent appeal during a peace vigil at St. Peter's Basilica on April 11: "This is a kingdom without swords, without drones, without revenge, without contempt for evil, without ill-gotten gains — only dignity, understanding, and forgiveness. It is here that we find the fortress against the illusion of omnipotence." The Pope warned that "war only divides humanity, while hope and faith can unite it," and called on world leaders: "Enough worshipping the self and money; enough displaying power; enough war."
