The Islamabad MOU: Inside the Fragile US-Iran Deal That Could Reshape the Middle East

On the margins of the G7 summit in Évian-les-Bains, and then separately in a video posted by French President Emmanuel Macron, President Donald Trump was seen signing what may prove to be the most consequential diplomatic document of his second term. The so-called Islamabad Memorandum of Understanding — brokered with the vital assistance of Pakistan's Prime Minister Shehbaz Sharif and Qatari mediators — formally declared an intent to bring about the "immediate and permanent termination of military operations" in a US-Israeli war with Iran that began on February 28 and had rattled the global economy for nearly four months. According to NPR, President Trump and Iranian President Masoud Pezeshkian both signed the MOU, with Pezeshkian sharing his signed copy on X and calling it "a historic document and a message from a strong Iran." The war had effectively shut down the Strait of Hormuz, through which roughly 20 percent of the world's oil and liquefied natural gas transited before hostilities began.

The 14-point document, read out by a senior US administration official and reported by CNN, stipulates that Iran will allow "safe passage of commercial vessels with no charge for 60 days only" through the strait, after which future maritime administration will be determined in dialogue with Oman and other Persian Gulf littoral states. In exchange, US Central Command lifted its naval blockade on ships entering and exiting Iranian ports, as USCENTCOM announced last week. The agreement also commits both sides to a 60-day window of technical negotiations covering the most sensitive outstanding issue: the future of Iran's nuclear program. Vice President JD Vance, who led the US negotiating team and traveled to Switzerland for the first round of talks, said that Tehran had agreed to invite International Atomic Energy Agency inspectors back into the country, describing it as "a major milestone for the American people."

Yet the deal is under immediate strain. As NPR reported, barely days after the MOU was signed, Iran's military announced it had temporarily re-closed the Strait of Hormuz, citing continued Israeli strikes against Hezbollah in Lebanon — a condition Tehran had insisted must cease as part of any agreement. Israeli Defense Minister Israel Katz had asserted that Israel would keep troops in southern Lebanon indefinitely, a position that sits awkwardly within the MOU's framework. The Center for Strategic and International Studies published a blunt assessment on June 23, arguing that the framework agreement is lopsided: Iran gets most of what it wants and gets it upfront, before negotiations on a final deal have even begun, while the United States and Israel receive comparatively little. Trump himself told The New York Times that if no final deal was reached, he could relaunch attacks on Iran or make the United States "the guardian of the Middle East" in return for 20 percent of the region's revenues.

The geopolitical reverberations are already being felt well beyond Tehran and Washington. G7 leaders in Évian issued a joint declaration calling the deal a "historic opportunity to prevent Iran from acquiring any nuclear weapon," according to NBC News, and pledged to contribute to its implementation. European leaders from the UK, France, Germany and Italy called for swift implementation and the urgent reopening of the strait. The MOU also contains an ambitious — and largely undefined — commitment from the United States and regional partners to develop a plan involving at least 300 billion dollars for the reconstruction and economic development of Iran, a detail that is certain to face fierce scrutiny from Republican hawks on Capitol Hill. CSIS analysts noted separately that Iran war costs for the United States are already estimated at between 34 billion and 42 billion dollars, with neither the FY2026 nor the FY2027 defense budgets including war costs — setting up a major congressional battle over financing.

With the first round of high-level negotiations concluded in Switzerland, both sides agreed to a "road map" for a final deal within 60 days and established a communication line to avoid incidents in the strait, according to a statement from Qatari and Pakistani mediators reported by NPR. The sides have given themselves that same 60-day window to reach a technical agreement on how to down-blend Iran's highly enriched uranium and freeze its nuclear program — a tall order given how difficult it was to produce the far less detailed MOU itself. Some hawks in both the United States and Israel fear there will never be a final deal and that the war will end with nuclear questions unresolved. How Washington manages the Israeli wild card — particularly ongoing Hezbollah hostilities in Lebanon — may well determine whether this fragile diplomatic architecture holds or collapses before the summer is out.