U.S., Iran begin delicate talks in Switzerland amid Strait tensions

U.S. and Iranian negotiators met in Switzerland as a fragile interim arrangement took shape around two flashpoints, Iran’s nuclear program and the Strait of Hormuz. The talks followed an initial U.S.-Iran agreement reached on June 15 that set up a 60-day window for final negotiations, even as Washington and Tehran traded claims over whether the waterway had been closed again.

The diplomatic opening came against a volatile military backdrop. U.S. officials said on June 20 and June 21 that the Strait of Hormuz remained open, despite Iran’s military saying on June 20 that it was shutting the passage again and citing alleged ceasefire violations. At the same time, the U.S. military was monitoring the situation while negotiators prepared for the Swiss meetings, underscoring how quickly a negotiation over uranium enrichment and sanctions relief could collide with a shipping crisis in the Gulf.

The regional temperature was rising elsewhere too. Reuters reported that Israeli strikes in Lebanon killed at least 20 people on June 20, one day after a ceasefire with Hezbollah took effect. Earlier strikes in southern Lebanon killed at least seven people, including two children, a toll that widened the sense that the Gaza war and the conflict with Hezbollah still threatened to spill across borders even as diplomats tried to create a narrow path toward de-escalation.

That is the backdrop for Face the Nation with Margaret Brennan, which centered its June 21 broadcast on the talks and the danger surrounding them. U.N. Ambassador Mike Waltz, appearing from New York, joined Republican Sen. Lindsey Graham of South Carolina and Democratic Rep. Jason Crow of Colorado, whom CBS described as a key Democrat on the House Intelligence Committee. The lineup reflected how the administration’s Iran strategy had become a live test for both parties, with national security hawks and skeptical Democrats watching for signs of whether the United States would back a deal, tighten pressure, or prepare for a break in the talks.

CBS also said Vice President J.D. Vance’s trip to Switzerland had been postponed, delaying the start of technical talks. The broader broadcast lineup included Anthony Salvanto, CBS News director of elections and surveys, and a panel with Amos Hochstein, signaling that the network was treating the negotiations not as a diplomatic sideshow but as a central test of U.S. policy in a region where a shipping lane, a nuclear file and an active battlefield were all moving at once.