Officials said the difficulty in reaching Khamenei “means there can be a long delay before the U.S. receives a response” after it sends proposed details.

US-Iran nuclear talks remain stalled as new Supreme Leader Mojtaba Khamenei rejects key demands. The US has frozen $344M in Iran-linked crypto assets.

Officials at the highest levels of the Iranian government say they don't know where Mojtaba Khamenei is and have no way to contact him directly, relying instead on a network of…