US and Iranian delegations arrived in Switzerland on June 21, 2026 to begin negotiations aimed at ending the war between them. Steve Witkoff, a US envoy, is leading the American side. The talks started under immediate tension: Iran's military announced it was closing the Strait of Hormuz on June 20. The US military rejected this claim. President Trump then threatened to impose American tolls on ships using the Strait — an unusual move, since about a fifth of the world's oil passes through this waterway.

Why does this matter? The Strait closure is not just a separate conflict. It is actually part of the negotiations themselves. Reuters reported that a draft agreement between the US and Iran already includes a requirement: Iran must reopen the Strait before any deal is final. Pakistan announced the outline of this agreement on June 18, saying Iran would quickly restore shipping access. By announcing another closure, Iran is either making a last-minute bargaining move before signing or sending a signal that leaders in Tehran don't all agree.

How These Talks Came Together

These negotiations took time to arrange. Vice President JD Vance was supposed to lead the US team but delayed his trip to Switzerland in mid-June. Reuters reported this delay made a quick peace deal less likely. Witkoff went instead, which is actually strategic: an agreement signed by an envoy can be upgraded to the president level later, giving both countries more flexibility without forcing early public commitments.

The US has been pressuring Iran in several ways since early 2026. In February, Trump signed an order strengthening the national emergency declaration against Iran and allowing tariffs on countries that trade with Tehran. In March, Secretary of State Marco Rubio met with other world powers at the G7 to align everyone against Iran, telling reporters that allies agreed with the US position. By June 3, Trump was discussing the negotiations on a podcast, using direct media to set public expectations.

These talks are connected to Lebanon. On June 2–3, the US brought Israeli and Lebanese representatives together for the fourth time, and they released a joint statement about continuing peace efforts. But the situation on the ground remains tense. Israeli Defense Minister Israel Katz said on June 15 that Israel would not leave its zone in southern Lebanon, and Israeli troops were still there in early June. Lebanon's defense minister rejects Israeli presence; Hezbollah rejects the ceasefire entirely.

This creates a three-way connection: Iran, Lebanon, and Israel. If Iran agrees to stop sending weapons to Hezbollah — or at least pause that support — it changes what happens next for Lebanon and for Israeli troops leaving the region. The Switzerland talks depend on this outcome, even though neither side has guaranteed anything yet.

The big question now is simple: Will Iran use the Strait closure as a bargaining chip at the table, or does it mean Iran is taking a harder line? The move helps Iran's leadership look tough at home while also giving negotiators something concrete to trade — reopen the Strait in return for reduced US sanctions or a ceasefire deal. Iran has used this strategy before: act aggressive in public, negotiate quietly behind closed doors. Whether that happens again will be clear by the end of this week.