Interim US-Iran deal leaves the thorniest issue still to be negotiated: Tehran’s nuclear program

Vice President JD Vance appears on "Hannity" on Monday, June 15, 2026, in New York. (Photo by Charles Sykes/Invision/AP)

2026-06-17T04:01:10Z

WASHINGTON (AP) — The interim deal between the U.S. and Iran is supposed to usher in a two-month period that would address the most divisive issue between the longtime adversaries — Tehran’s nuclear program.

Preventing Iran from attaining a nuclear bomb is a key reason that President Donald Trump said he launched the war alongside Israel in February, but the tentative agreement he has trumpeted leaves little runway to negotiate the long-running sticking point. The previous nuclear pact between Iran and world powers, which Trump pulled the U.S. from in his first term, took many months to negotiate.

Few details have been publicly released about the initial deal, set to be officially signed Friday in Switzerland, but it generally calls for reopening the Strait of Hormuz to global oil shipments, financial incentives for Iran if it meets certain benchmarks, and a 60-day period for talks on ending the country’s nuclear program.

There is deep skepticism among both Republican and Democratic lawmakers, pro-Israel advocates and Israel itself that the deal is realistic, workable or would have any effect on nuclear talks.

“My skepticism is Iran itself. What would a good deal look like? No enrichment. And we’ll see if we can get there,” Republican Sen. Lindsey Graham of South Carolina, a close Trump ally and longtime Iran hawk, said Tuesday. “But whether or not we can get phase two, I don’t know.”

A nuclear deal takes commitment to the details

David Schenker, director of the Arab Politics Program at the Washington Institute for Near East Policy, said that “this administration has proven that it has a hard time keeping its attention on these issues.”

Schenker, who served as assistant secretary of state for Near Eastern Affairs in the first Trump administration, questioned whether the current administration would have the wherewithal to reach a nuclear deal even if the agreement is signed Friday.

“This is the kind of thing that requires dogged attention, attention to detail and numerous technical experts involved,” he said. “Trump loses his attention, moves on, and so does the administration. It’s like they don’t understand Iran’s strategy. They didn’t get it the first time, or the second.”

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The Trump administration has maintained its confidence. Vice President JD Vance said much of the technical detail must be negotiated but that the U.S. must see action for Iran to receive incentives like sanctions relief.

“Our plan under this deal is, again, the Iranians are getting a lot of benefits so long as they dismantle that nuclear weapons program,” Vance told Megyn Kelly on her podcast Tuesday.

“People always ask me, ‘Why do you believe it this time?’ I don’t believe them,” he added. “I don’t trust anything that anybody says. I trust what people do. And the way this deal is structured is that as they do more, they receive more. As they do less, they receive less.”

Iran has long maintained its nuclear program is peaceful.

It took over a year and a half to get the previous nuclear deal

The 2015 Joint Comprehensive Plan of Action, or JCPOA, took more than 18 months to negotiate, starting with secret talks between U.S. and Iranian officials in Oman at the end of then-President Barack Obama’s first term.

They required dozens of direct high-level interventions from Secretary of State John Kerry and Energy Secretary Ernest Moniz, not to mention a team of dozens of technical experts traveling to Europe and elsewhere before the conclusion of the negotiations in Vienna, Austria.

Trump withdrew from the JCPOA in 2018 before most of its more contentious concessions had come into effect, and there is no indication now that Iran is willing to offer much more.

The JCPOA relied on very technical language and understandings, including limits on uranium enrichment, advanced centrifuges and heavy water production. In exchange, Iran was granted significant sanctions relief, amounting to billions of dollars.

As unhappy as critics were about the JCPOA — Trump called it the “worst deal ever negotiated,” while all Republicans and a number of prominent Democrats voted against it — all sides acknowledge it took more than 18 months to get to an even imperfect agreement.

Republicans say Congress must approve any deal

Republicans say any nuclear deal with Iran should be brought to Congress, as required by law. GOP Sen. Ted Cruz of Texas said he “would certainly anticipate that” the Senate will get the final say.

GOP Sen. John Kennedy of Louisiana said he had little confidence Iran would abide by any agreement.

But Sen. Roger Marshall, R-Kan., one of a handful of senators who has spoken to Vance about the agreement, said the shortened timeline could be an advantage.

“Iran’s modus operandi is to negotiate for the purpose of delaying, so they can rearm themselves,” Marshall said. “I think the president has to give them some type of a finite amount of time, or there’s going to be consequences. So I think it can be done.”

Sen. Tim Kaine, D-Va., noted that what could help Trump’s negotiators to hammer out a nuclear agreement in such a truncated timeline is that there is “a base” to work from following the Obama-era talks.

Still, the JCPOA “took years to put together. You had allies and even adversaries — China and Russia — around the table, you had the IAEA at the table, the Obama chief negotiator had a Nobel Prize in physics, Ernie Moniz,” Kaine said. “I don’t know that either Jared Kushner or Steve Witkoff have a Nobel Prize. So it’s going to be hard.”

Trump envoys Witkoff and Kushner, neither of whom had any prior experience in nuclear negotiations, made numerous but ultimately unsuccessful attempts to reach an agreement under Omani mediation during the first months of Trump’s second term.

Those tapered off after the U.S.-Israel attacks on Iranian nuclear sites in June 2025 — after which Pakistan emerged as the main facilitator.

There also is uncertainty about other issues besides nuclear that have been of concern to Arab countries, Israel, Europe and the United States.

It is not clear that any of those issues, including Iran’s ballistic missile program, its support for militant proxies in the region or repression of its own people, will be addressed by either the interim or potential longer-term agreements.

Without significant capitulations by Trump up-front, it is hard to imagine that nuclear negotiations with Iran will take only several months.

“A deal is better than more fighting, but the war America and Israel prosecuted against Iran has fallen short of achieving its stated objectives,” said Brian Katulis, a senior fellow at the Middle East Institute. “This agreement is mostly about cleaning up an unnecessary mess and putting the best face on it.”

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Associated Press writers Seung Min Kim and Nathan Ellgren contributed to this report.