Two days after President Trump and Iranian President Masoud Pezeshkian signed a 14-point nuclear Memorandum of Understanding on June 17, the first round of formal talks collapsed. The venue was Bürgenstock resort in Switzerland — and not a single delegate had arrived. VP JD Vance canceled his Switzerland trip on the morning of June 19. The reason: overnight, Israel struck at least 80 Hezbollah targets in Lebanon's south, killing at least 21 people. Separately, a Hezbollah explosive device killed a four-person IDF tank crew, including a battalion chief. Iranian Foreign Minister Abbas Araghchi had warned the week before that any Israeli attack in Lebanon would be treated as a violation of the MOU. The Swiss Foreign Ministry confirmed the postponement and set no new date.

1. Iran Said This Would Happen

FM Araghchi drew a red line on June 16 — three days before the talks were set to begin.

Iran's Foreign Minister made the condition explicit before the first meeting. On June 16, Araghchi told foreign ambassadors in Tehran: "Any military attack by Israel against Lebanon from this point forward, as well as any continued occupation of Lebanese territories, will be regarded by us as a violation of the memorandum of understanding." He added: "If Beirut were attacked, we would not tolerate it under any circumstances. From our perspective, such an action would mean that the ceasefire had been completely broken, and our armed forces would respond." Israel struck Lebanon that night and again overnight June 18-19, killing 21 people. Iran didn't send a delegation.

Pezeshkian's post-strike message was careful but clear. Iran has "not abandoned negotiations," he posted on X — "but also has not left the battlefield." Iran will negotiate — but not while Israeli forces are bombing Lebanese villages and occupying territory the MOU was supposed to end.

2. But the US Is Still Defending the Deal

The 60-day window is the test, Vance says — not the first day.

Vance picked a side — and it isn't Israel's. He told reporters: "If I was in the Cabinet of the Israeli government, I might not be attacking the only powerful ally that I have anywhere left in the entire world." Trump went further in private: he reportedly told Axios that Netanyahu has "no fucking judgment" after an Israeli strike in Beirut came "an hour before we are supposed to sign the deal."

The White House is betting the deal survives the early turbulence. The MOU gives 60 days to negotiate a final agreement; the White House described Vance's cancellation as "logistical challenges," not a collapse. But CNN's analysis that day was blunter: the MOU calls for "immediate and permanent termination of military operations on all fronts, including Lebanon" — but never requires Israel to withdraw from Lebanese territory. That structural gap is what Israel is driving through.

3. Still, Israel Says It Isn't Bound by the Deal

Defense Minister Katz made the Israeli position explicit — despite US pressure.

Israel didn't sign the MOU — and it isn't stopping. Israeli Defense Minister Israel Katz vowed the occupation of southern Lebanon would continue "without any time limit," with villages "cleared of local residents," and "despite all the existing pressures" from the US. Prime Minister Benjamin Netanyahu has stayed largely silent on the deal and has not committed to withdrawing from Lebanon; he is under pressure from far-right coalition partners Finance Minister Bezalel Smotrich and National Security Minister Itamar Ben-Gvir to continue the fight.

Israel's position exploits the MOU's biggest flaw. The document calls for ceasing military operations in Lebanon but doesn't require Israeli withdrawal from Lebanese territory it currently occupies. Iran interprets continued strikes and occupation as a violation. Israel interprets the same absence of language as permission to stay. The US, which designed the agreement without Israel's signature, is now trying to hold together a deal that Israel's military is actively undermining. Meanwhile: 3,798 people have been killed in Lebanon since the war began on March 2, including 247 children. The UN says 12 children are being killed or maimed in Lebanon every day.

Where This Lands

The 60-day window for a final deal has started with the first talks already postponed and no new date set. The MOU calls for stopping military operations in Lebanon but never mandates Israeli withdrawal. That means every Israeli strike hands Iran a pretext to walk, and no one in the agreement can stop it. Vance's job now is to keep both Iran and Israel from pulling out of a process that one of them never signed.

Sources