THE ISLAMABAD IMPASSE

April 13, 2026 | Issue No. 13

US-Iran Talks Collapse After Historic Marathon Negotiations

The most consequential diplomatic encounter between Washington and Tehran in nearly five decades ended without a deal late Saturday night in Islamabad. Vice President JD Vance led a senior American delegation including Steve Witkoff and Jared Kushner into a two-day negotiation session hosted by Pakistan, marking the first direct, face-to-face talks between the two governments since the 1979 Islamic Revolution. The sessions ran for more than 21 consecutive hours across Saturday and Sunday before Vance emerged to declare no agreement had been reached, calling the result “bad news for Iran.” Iran’s Vice President Mohajerani fired back immediately, telling state media that the “worse news is for the United States,” accusing Washington of trying to win at the negotiating table what it could not win on the battlefield. Iran’s Foreign Ministry said the two sides remained far apart on two to three key issues and that excessive American demands had blocked any common framework. Vance, boarding Air Force Two, confirmed that the US had presented its “final and best offer,” that the terms were “quite flexible,” and that Iran had “chosen not to accept” them. As of Monday morning, April 13, all parties have departed Islamabad with no further talks scheduled.

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The American View: Final Offer, Blockade Threat, and Military Buildup

Washington entered Islamabad with a clear bottom line: Iran must commit, in writing, to permanently abandoning its nuclear weapons program and relinquishing the enrichment capacity to rapidly develop one. President Trump publicly raised the stakes before negotiations even began, ramping up threats against Iran throughout the week of April 6 and declaring on Easter Sunday that he would bomb power plants and every major bridge in Iran by Tuesday unless Tehran reopened the Strait of Hormuz. After the ceasefire was announced on April 7, Trump momentarily stood down from that threat, but the Islamabad failure triggered an immediate reversal. Within hours of Vance’s press conference, Trump posted on Truth Social accusing Iran of “extortion” and declaring the US Navy would blockade the Strait of Hormuz effective Monday at 10 a.m. EDT. US Central Command confirmed that the blockade would cover all Iranian ports and coastal areas on the Arabian Gulf and Gulf of Oman, though CENTCOM clarified it would still permit ships traveling between non-Iranian ports to transit the waterway, moderating Trump’s earlier all-or-nothing framing. Military analysts noted the US has been moving combat power into the region throughout the ceasefire period: a third aircraft carrier as well as thousands of Marines and paratroopers are expected to arrive in the Middle East later this month. Rapidan Energy founder and former White House energy advisor Bob McNally told CNBC the US military is “getting ready for round 2,” and predicted that Iran’s leverage over the strait will erode as Washington systematically degrades Tehran’s ability to use mines, anti-ship missiles, small fast-attack boats, drones, submarines, and long-range artillery. Newsweek reported Trump separately warned the US military is “locked and loaded” and ready to act against Iran if no deal materializes.