Switzerland's foreign ministry called off the first round of technical talks between the United States and Iran on Friday, hours after Vice President JD Vance abandoned his flight to Burgenstock and Israeli airstrikes killed at least 18 people in southern Lebanon, the most serious test yet of the 14-point memorandum of understanding President Trump and Iranian President Masoud Pezeshkian signed two days earlier.
The collapse of the Burgenstock round, paired with a public break from Senate Armed Services Chairman Roger Wicker and other Republicans, narrowed the diplomatic and political room the White House has to convert the accord into a durable settlement. The deal had already reopened the Strait of Hormuz and started a 60-day clock for talks on Iran's nuclear program. Friday's events put both pieces in question.
What Switzerland said
"The planned talks between the U.S., Iran, Qatar and Pakistan have been postponed," the Swiss foreign ministry said, adding that "Switzerland remains ready to facilitate these talks" and that "The relevant preparatory work at Burgenstock is continuing". The ministry did not set a new date.
Vance's trip was scrubbed the night before. "The plans for the upcoming technical talks have not been finalized, and the U.S. delegation has been prepared to depart at the first available opportunity," a White House spokesperson said, adding that "the logistics of these negotiations have never been simple or predictable". Earlier Thursday, Vance had told reporters the talks would likely begin over the weekend.
The Financial Times reported, citing three people familiar with the matter, that the round was called off because of the overnight Israeli air campaign in Lebanon. Al-Mayadeen, a pan-Arab channel allied with Hezbollah, reported that Iran had held its delegation back over the same strikes.
Lebanon escalates
Lebanon's Health Ministry said 18 people were killed in the south after a series of Israeli strikes overnight. Israel's military said four of its soldiers were killed in what it described as intense fighting, and identified one of the dead as a lieutenant colonel.
Israeli Prime Minister Benjamin Netanyahu, who faces elections later this year, said he had ordered the Israel Defense Forces to strike Hezbollah "with full force". In a social media post, Netanyahu said his "directive is clear: Israel will not tolerate attacks on our soldiers or our territory, and it will exact a very heavy price from Hezbollah for these attacks". He added that "Israel will remain in the security zone in southern Lebanon for as long as required to protect the settlements in the north".
The memorandum signed Wednesday calls for "the immediate and permanent termination of military operations on all fronts, including in Lebanon" and for "ensuring the territorial integrity and sovereignty of Lebanon". Hezbollah has said that language requires Israeli forces to leave Lebanese territory, and that it will treat their continued presence as a breach. Iran's chief negotiator, Mohammad Bagher Ghalibaf, said Friday that any talks would remain bound by Tehran's red lines, warning, according to the official IRNA news agency: "If the enemy seeks to be excessive, we have proven that our fingers are on the trigger and we have no hesitation in giving a crushing response to the enemy".
Republicans break ranks
Senior Trump administration officials briefed House and Senate leaders Thursday afternoon on the memorandum, including Senate Majority Leader John Thune, Minority Leader Chuck Schumer and the top members of the Senate Foreign Relations and House Foreign Affairs committees. Several Republicans, including some who rarely criticize Trump, said they were not reassured.
Sen. Roger Wicker of Mississippi, who chairs the Senate Armed Services Committee, said in a statement: "I am concerned that the memorandum of understanding negotiates away the victories of Operation Epic Fury in ways that are completely out of step with the President's goals".
Vance pushed back. "The United States isn't giving up a cent of money to Iran," he said, adding that "The only way the Iranians get any of these resources ... is if they comply fully" with the terms of the deal. The memorandum includes sanctions relief, access to frozen funds and a proposed $300 billion reconstruction plan. Trump, on Truth Social on Thursday, called critics "jealous, bad people, or stupid" and wrote: "The Markets are loving what is happening with Oil Prices way down, and Stocks way up".
The counterparty
Iran's supreme leader, Ayatollah Mojtaba Khamenei, framed his approval of the memorandum as conditional. "In principle, I had a different opinion," Khamenei said in a Thursday statement, adding that he allowed the agreement only after Pezeshkian accepted responsibility for safeguarding Iran's interests and that future direct talks with the U.S. do not imply submission to "the enemy's opinion".
The counterpoint
The Israeli-aligned objection is the one the White House cannot wave off. David Roche, a strategist at Quantum Strategy, told CNBC that the falling oil price is the only clear benefit and that "Beyond that, this is a really bad deal", arguing the accord strengthens Iran in the Gulf. "Iranians, I will predict you confidently, will never, never abandon their nuclear ambitions," Roche said. UBS, in a research note, called the deal "an important breakthrough" that marks "really the beginning rather than the end of the process to try to end the war and address Iran's nuclear capabilities".
Mediators including Pakistan, Saudi Arabia and Turkey have agreed to meet in the Egyptian city of Alamein on Sunday to try to keep the accord intact, Cairo and Islamabad said. Whether Vance boards a plane to Burgenstock before that gathering is the next concrete test of the 60-day clock.