On June 21, 2026, President Trump publicly warned that the United States would attack Iran "very hard" if the Iranian government does not stop supporting Hezbollah. On that same day, Vice President JD Vance was in Switzerland meeting with Iranian officials and representatives from Pakistan and Qatar to try to stop the fighting in Lebanon.

This might seem odd — threatening military action while sitting down to talk — but it is actually a calculated strategy. The idea is to use the threat of force as leverage to get better terms at the negotiating table. Trump had already sent his special envoy, Steve Witkoff, to Switzerland earlier in the week to set up the meetings, per CNN.

The talks had broken down once before. After Hezbollah killed four Israeli soldiers, Israel launched military strikes in retaliation, and the meetings were cancelled, The Guardian reported. But on June 19, Israel and Hezbollah agreed to a temporary pause in fighting — a ceasefire. This gave diplomats a window to try again.

The Main Problem

The two sides are stuck on a basic disagreement. Iran says that before Hezbollah stops fighting, Israel must promise to leave Lebanese territory. For Iran, this is non-negotiable, according to AP and the New York Times. Hezbollah agrees — it says it will not stop attacking until Israel agrees to withdraw.

Israel says no. The current ceasefire agreement says Lebanon's government should prevent Hezbollah from attacking Israel. But Israel has not promised to leave Lebanon, and Hezbollah has not disarmed. Both sides say the other must move first. That is why the ceasefire is fragile and could break at any moment.

Trump has also made clear he is unhappy with how Israel is handling this. He said he was "not happy" with Israel's approach to the Hezbollah problem, per AP. He even said he would tell Israeli Prime Minister Netanyahu not to retaliate if Iran strikes back — a way of trying to keep the talks from falling apart, Reuters reported.

Why the Threat Matters

Threatening force while negotiating only works if the other side believes the threat is real. Iran has heard Trump's tough language before. The question is whether Iran's leaders think the U.S. will actually attack Iran itself — not just Hezbollah in Lebanon — if fighting continues.

For Iran, attending the talks in Switzerland is valuable, even if no deal is reached. Sitting at the table makes Iran look reasonable and international. Iran can keep the talks going indefinitely while Hezbollah keeps its military options open — as long as the U.S. allows it.

Trump is trying to change Iran's thinking. If the U.S. attacks Iran directly instead of just targeting Hezbollah, the cost to Iran goes way up. Whether the talks in Switzerland produce an agreement on the central question — whether Hezbollah stops first or Israel withdraws first — will determine if the ceasefire lasts or collapses again.

The fact that Pakistan and Qatar are also in the talks is worth noting. Qatar has historically acted as a back channel between Washington and countries the U.S. does not officially deal with. Pakistan's involvement is less common and may suggest a wider effort to stabilize the entire region. The specific details of what was discussed on June 21 have not been released to the public.