Speaking in an interview with Fox News on Monday, Vance said the United States had clearly defined its “red lines” during negotiations held over the weekend in Pakistan, where he led a U.S. delegation in discussions with Iranian officials.“I really think the ball is in the Iranian court, because we put a lot on the table,” Vance said, adding that the U.S. position leaves no room for flexibility on key issues.

He identified two core demands: U.S. control over Iran’s enriched uranium stockpile and the establishment of a robust verification mechanism to ensure Tehran does not develop nuclear weapons capability. “It’s one thing for the Iranians to say that they’re not going to have a nuclear weapon.

It’s another thing for us to put in place the mechanism to ensure that’s not going to happen,” he said.The talks in Islamabad marked the highest-level engagement between the two sides in years but ended without an agreement to halt the more than five-week conflict involving U.S. and Israeli forces against Iran.

Vance said that, as part of a two-week ceasefire agreed last week, Washington also expects Iran to fully reopen the Strait of Hormuz, a critical global shipping route that has been effectively closed by Iranian forces.

Despite the lack of a deal, both sides have indicated a willingness to continue discussions, with diplomatic efforts ongoing through intermediaries to prevent further escalation.