U.S. and Iran report progress, but remain split on key issues
Talks edged forward, but Iran’s roughly 440 kg uranium stockpile and a proposed Hormuz toll system still threatened any deal.
Diplomatic momentum around U.S.-Iran peace talks picked up as Pakistan stepped up mediation, but the two sides remained far apart on the issues that could still kill a deal. Marco Rubio said there had been “some good signs” and “slight progress,” yet Iranian sources said no agreement had been reached, only that the gaps had narrowed. In practical terms, that meant the sides were still talking, but had not resolved the questions that matter most: Iran’s enriched uranium stockpile and control of shipping through the Strait of Hormuz.
The nuclear dispute remains the sharper red line. Reuters and other coverage cited an estimated stockpile of about 440 kg of uranium enriched to 60 percent, a level close to the 90 percent threshold generally associated with weapons-grade material. The International Atomic Energy Agency has referred to “a stockpile of more than 400 kg of highly enriched uranium” and urged a return to negotiations. Donald Trump said the United States would eventually recover Iran’s highly enriched uranium stockpile and signaled he was willing to wait only a few days for “the right answers.” Israel, the United States and other Western governments accuse Iran of seeking a nuclear weapon, while Tehran says its program is peaceful.
Maritime security in the Strait of Hormuz is the other major fault line. Rubio said a Strait of Hormuz tolling system would be “not acceptable” and could make a deal unfeasible. Bloomberg reported that Iran has been discussing with Oman a permanent toll system that would formalize its control of traffic through the waterway, one of the world’s most sensitive energy chokepoints. The World Bank has said disruption in the strait triggered a major oil-market shock, and traders reacted accordingly: oil prices moved higher as markets doubted any near-term breakthrough.
The talks unfolded against a fragile ceasefire and repeated warnings that military action could resume if diplomacy failed. Reuters reported on Thursday, May 21, 2026, that Pakistan was pushing the process forward and that Mohsin Naqvi could head to Tehran as part of the effort. For now, the pace of diplomacy has quickened, but the core disputes remain intact, leaving the prospects for a lasting agreement uncertain.
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