Diplomats are preparing for a fresh round of direct negotiations between Washington and Tehran as early as this week, two sources told NBC News, signaling continued momentum despite a failed peace push in Pakistan over the weekend.
Vice President JD Vance led talks in Islamabad aimed at ending the broader conflict, but the discussions did not produce an agreement. Still, both Vance and President Donald Trump expressed openness to resuming negotiations Monday, even as the U.S. tightened economic pressure by establishing a naval blockade at Iranian ports.
The core dispute centers on Iran's nuclear program. Washington demanded a 20-year freeze on uranium enrichment, but Tehran countered with an offer of only three to five years, a gap Trump rejected. On the question of highly enriched uranium already in Iran's possession, the U.S. seeks its complete removal, while Iran proposed a "monitored process of down blending," in which dangerous uranium would be diluted with less potent material to reduce its weapons potential.
"The ball really is in their court," Vance said in a Fox News interview, characterizing Tehran's next move as pivotal. He acknowledged some "good conversations" took place in Pakistan but insisted Iran "didn't move far enough." Trump took a more casual tone, saying he didn't "care" whether Iran returned to talks while noting that appropriate people had called him wanting to work out a deal.
A U.S. official confirmed continued engagement and what they described as forward momentum toward an agreement. The administration faces political pressure to deliver results: American voters are souring on the conflict with Iran as inflation persists and gas prices remain elevated, a headwind for Republicans heading into November's midterm elections, when they will defend their narrow House majority and Senate control.
Vance emphasized two non-negotiable demands. "We must have the enriched material out of Iran," he said, coupling that with insistence on "their conclusive commitment to not develop a nuclear weapon." He credited Tehran with showing some flexibility during the Pakistan discussions but signaled the concessions were insufficient to unlock a deal.
The International Atomic Energy Agency estimates Iran possesses nearly 1,000 pounds of highly enriched uranium, theoretically enough for eleven nuclear weapons. Iran counters that most of this material remains buried underground following U.S. airstrikes on enrichment facilities last year. Tehran maintains its nuclear program is purely civilian and that it harbors no intent to build a weapon.
Separately on Tuesday, Israel and Lebanon held rare direct talks in Washington with Secretary of State Marco Rubio present. The meeting marked the first such direct engagement since 1993 and aimed to defuse tensions that could jeopardize the broader ceasefire. Israel has launched a major military operation in southern Lebanon and carried out intensive air strikes on Beirut, while Hezbollah, the Iran-backed militant group, has fired rockets at Israel in response to earlier U.S. and Israeli strikes on Iran.
The State Department said the Israel-Lebanon discussions would focus on Israel's northern border security and Lebanon's sovereignty. A key complication: Hezbollah has urged the Lebanese government to abandon the talks, and while Washington and Israel say Lebanon is not covered by the ceasefire, Iran and mediator Pakistan insist it is.
The blockade of Iranian ports remains a major flashpoint. Iran's armed forces accused the U.S. of "piracy" and threatened retaliation against Gulf ports if their own were struck. Opening the Strait of Hormuz to unimpeded shipping traffic ranks as a critical negotiating demand for Iran. Yet a two-week ceasefire has so far held despite the escalatory rhetoric on both sides.
Ross Harrison, a senior fellow at the Middle East Institute and author of "Decoding Iran's Foreign Policy," said both sides recognize the limits of further escalation. "There's a recognition that despite all the posturing, both on the ground with the blockade and also with some of the war of words, there's a recognition that the only way really to resolve this is through negotiation," he said. "I don't think anybody relishes escalating further."
Author Sarah Mitchell: "The administration is gambling that Tehran will blink first on enrichment, but Iran's willingness to move only a few years instead of two decades suggests this gap may take far more than a week to close."
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