Iran Sanctions: US Sanctions on Iran, Their Impact and Latest Developments

US-Iran negotiations have moved through more than a year and a half of talks, collapsed ceasefires, and renewed fighting, and as of late September 2026 the two sides are once again engaged in indirect diplomacy in New York, centered on a narrower, faster proposal to reopen the Strait of Hormuz. For the broader backdrop, see our coverage of Iran-US relations.

US-Iran Negotiations: How the Talks Began

The current round of US-Iran diplomacy traces back to April 12, 2025, when Iran and the United States began a series of talks aimed at a nuclear agreement, following a letter from President Donald Trump to Iranian Supreme Leader Ali Khamenei, with Trump setting a 60-day deadline for a deal. The first high-level meeting was held in Oman, led by US special envoy Steve Witkoff and Iranian Foreign Minister Abbas Araghchi, with both sides initially describing the discussions as constructive.

Several more rounds followed in Rome and Muscat, with expert-level talks eventually joining the high-level discussions. Central sticking points emerged early and would recur throughout the process: whether Iran could retain any domestic uranium enrichment capability, what would happen to its enriched uranium stockpile, and what sanctions relief Iran would receive in exchange.

US-Iran Negotiations: The Collapse Into War

When the 60-day deadline passed without an agreement, Israel launched large-scale strikes against Iran in June 2025, targeting military leadership and nuclear scientists, which prompted Iran to suspend the nuclear talks indefinitely and led the United States to carry out its own strikes on Iranian nuclear sites at Fordow, Natanz, and Isfahan. A ceasefire followed, but diplomacy stayed largely frozen for months.

Talks resumed in early 2026 after large-scale protests inside Iran, even as the US military buildup in the Middle East continued. That opening proved short-lived: on February 28, 2026, the United States and Israel launched a new round of large-scale strikes on Iran, marking the start of what is now referred to as the 2026 Iran war, an escalation that included the assassination of Khamenei and of Ali Larijani, a senior figure who had been involved in the negotiations.

US-Iran Negotiations: The June 2026 Memorandum and Its Breakdown

By late May 2026, reports indicated the US and Iran were nearing a broader agreement, with Trump suggesting the Strait of Hormuz could soon reopen under a ceasefire framework. On June 17, 2026, Trump and Iranian President Masoud Pezeshkian signed what became known as the Islamabad Memorandum, setting out a 60-day ceasefire period during which further talks were meant to resolve the final status of Iran’s nuclear program.

The arrangement didn’t hold. Technical talks scheduled in Switzerland were postponed within days, and by late June both sides had traded accusations of ceasefire violations, with the US striking Iranian missile, drone, and radar infrastructure and Iran firing missiles and drones at US positions in Kuwait and Bahrain in response.

US-Iran Negotiations: Where Talks Stand Now

The US-Iran negotiations drawing attention in late September 2026 center on a narrower, Qatari-mediated proposal rather than a comprehensive settlement. Iran presented the US with a road map calling for a regionwide ceasefire of up to 60 days, a phased reopening of the Strait of Hormuz, and an end to the US naval blockade of Iranian ports.

Iran has reportedly softened its position on both the strait and its nuclear program in exchange for an easing of the US blockade and the release of frozen funds, with discussions continuing quietly in New York as a prelude to more formal negotiations. The emerging proposal would first reopen the strait and lift the US blockade, with sanctions relief to follow — similar in structure to the June memorandum, but with Iran pushing for a much faster timeline this time.

The path forward remains unsettled. Trump reportedly told journalists he had rejected Tehran’s latest proposal to reopen the strait within a week, even as Iran’s foreign minister stayed in New York awaiting word from Qatari mediators. By September 30, Iran had received a formal US response to its seven-day trust-building proposal, though the contents weren’t disclosed publicly and a dispute reportedly remained over sequencing. Trump has framed his own choice bluntly, saying the US will either “blow them up or make a deal.”

US-Iran Negotiations: Core Issues Still Dividing Both Sides

• Uranium enrichment — the US wants it dismantled entirely; Iran has offered limits, dilution, or pauses, but not a permanent end.
• The Strait of Hormuz — reopening it, and in what order relative to other steps, has become a central sticking point.
• Sanctions and frozen assets — Iran wants funds released and sanctions lifted; the US ties this to nuclear compliance.
• Regional conflicts — disputes over Lebanon and Hezbollah complicate the broader picture, with Israel saying it isn’t bound by earlier provisions there.
• Trust — both sides have accused the other of bad faith, and that’s arguably the hardest issue to resolve.

US-Iran Negotiations: What Comes Next

Araghchi has said the negotiations have become more “serious,” while cautioning that Tehran’s core position hasn’t changed, and other reporting suggests a full deal remains unlikely before the US midterm elections. With both sides signaling openness to a deal while also preparing for renewed conflict, the US-Iran negotiations remain a genuinely fluid situation heading into October 2026 — worth checking current reporting from sources like the United Nations or the U.S. Department of State for the latest, since it’s shifted direction multiple times already this year.

Frequently Asked Questions About US-Iran Negotiations

When did the current US-Iran negotiations begin?

The current round traces back to April 12, 2025, following a letter from President Trump to Iran’s Supreme Leader and a 60-day deadline for a nuclear deal.

Why did the talks collapse into war?

When the original 60-day deadline passed without an agreement, Israel struck Iran in June 2025, and a second, larger round of US-Israeli strikes on February 28, 2026 escalated into what’s now called the 2026 Iran war.

What was the June 2026 memorandum?

Signed by Trump and Iranian President Masoud Pezeshkian on June 17, 2026, the Islamabad Memorandum set out a 60-day ceasefire meant to resolve Iran’s nuclear program, but it broke down within weeks.

What is the current state of US-Iran negotiations?

As of late September 2026, both sides are engaged in Qatari-mediated indirect talks in New York over a narrower proposal to reopen the Strait of Hormuz and lift the US naval blockade.

What are the biggest obstacles to a deal?

Uranium enrichment limits, the sequencing of a Strait of Hormuz reopening, sanctions relief, regional conflicts involving Lebanon, and a basic lack of trust between both sides.

Matthew Ammel, the former bodyguard who became Kyrsten Sinema’s lover, says he wrecked her Arizona home on August 30 because he believed she had sold out to the military industrial complex. Ammel, 39, told The Arizona Republic he was angry about her ties to companies he says profit from the war in Gaza and the conflict with Iran. He faces a grand jury and is due to be arraigned Thursday. The damage to the $2 million house in Cave Creek, a Phoenix suburb, has been reported at $200,000.

What Happened at the Cave Creek Home

Ammel was alone at the house on August 30, court records show. He told Sinema he would throw one of her paintings into the pool every 10 minutes until she posted a video on her account on X. She refused.

Ammel then dumped 22 of her paintings into the pool, according to court records. He also threw expensive liquor bottles, smashed a mirror and left glass across the house. He admitted to the Republic that he had been drinking.

The video he wanted posted is seven minutes long and was filmed during his first deployment to Iraq in 2007. It shows soldiers treating a bloodied man they had shot before loading him onto a helicopter, Ammel said.

Why He Says He Did It

Ammel told the Republic that Sinema “works for some of the companies that financially benefit from the genocide in Gaza and the current war we’re losing in Iran.” Sinema left the Senate in 2025 after a single term that began in 2019. She has since joined the law firm Hogan Lovells as a senior adviser.

“I was pissed at the system and I took it out on her art,” Ammel told the Republic. “The American people have no idea how [expletive] up our government is and, like, what our politicians spend their time doing.”

He also pointed to his own record in the military. “The same news channels and politicians championing war now were calling us terrorists and racists for our behavior during this time period. [None] of this makes sense. That’s what I was angry about,” he said.

Ammel described feeling like “arm candy” at events with Sinema. They included gatherings linked to the defense technology firm Palantir, a British American Tobacco board dinner and the wedding of CNN anchor Jessica Dean.

His last trip to Washington with her was to an event for Palantir CEO Alex Karp. Ammel called it a “genocide celebration” of the Gaza war. “Kyrsten was there rubbing elbows with Trump’s personal lawyer and, like, it was legitimately the most insane thing I had ever seen,” he said.

Palantir has a financial link to Sinema’s political past. Karp and other Palantir staff donated thousands of dollars to her campaign in 2022 and 2023, records show. She returned some of it when she dropped out of the 2024 race. Neither Sinema nor Palantir has publicly commented on whether she has a business relationship with the firm.

Ammel said his view of her changed over time. “She would talk about how she would take bad people’s money and use it for good, but like at some point, I didn’t see her doing good anymore. She was just doing the bad,” he said.

Sinema’s own record includes founding the Arizona Business Roundtable, launching an AI center at Arizona State University with OpenAI and lobbying for a data center in Chandler that was never built.

How the Two Met, and the Affair

Ammel, a former Green Beret, joined Sinema’s security detail in 2022 and later moved onto her staff. He met her through Tulsi Gabbard, whose sister ran the senator’s security detail at the time. The two bonded on a two-hour drive over his use of psychedelics to treat PTSD, he said.

They began an affair in 2024. His 14-year marriage to Heather Ammel collapsed over it.

Heather is now suing Sinema under North Carolina’s “homewrecker” law, which lets a spouse sue over a marriage ended by an outside relationship. Sinema admits the affair. She testified that it became sexual on a trip to Napa on May 27, 2024, months after she said she would not seek reelection. She said later meetings took place in New York, Washington, Colorado and Arizona.

Heather testified that her husband told her Sinema got “handsy” at a music festival in Tempe. She also claims Sinema asked him to bring MDMA on a 2023 work trip to “guide him through a psychedelic experience.” Sinema has not been reported to have responded to those claims in the material reviewed here.

Ammel disputed his ex-wife’s testimony that Sinema used her power as his boss to take advantage of him. “Kyrsten didn’t take advantage of me,” he told the Republic. “She was nice to me.”

The Breakup and the Custody Fight

Ammel said he had been trying to end the relationship before August 30. He had worked as a cowboy at a California National Guard base since March but kept returning to Arizona. When he fell ill, he said, Sinema urged him to come home.

He accused her of taking over his custody fight with his ex-wife. A hearing she helped prepare for with his lawyer and psychiatrist went badly, Ammel said. “When I tried to talk to her about it, she abandoned me,” he told the Republic. Both Sinema and Heather Ammel were at a hearing in Winston-Salem, North Carolina, on August 19.

Sinema then moved to friends’ homes and hotels, according to Ammel. About two weeks later, he wrecked the house.

Police arrested Ammel on September 17 after two weeks in and out of psychiatric care, which he said at one point felt “like a Nazi experiment.” The Republic also reported that he was accused in 2025 of strangling health care workers while committed in North Carolina. No outcome of that accusation appears in the reporting.

Ammel said he has lived in hotels in Maricopa County. He learned the relationship was over from a petition to have him hospitalized that described Sinema as his ex-girlfriend.

“I had a dumb job, but I’m not dumb. Or crazy, I’m just sick of the system,” he told the Republic. “I want to see my kids and my dog Scout and go back in the Army.”

What Happens Next

Ammel’s case has been sent to a grand jury, court records show. He is due to be arraigned Thursday, and a trial is set for February 25, 2027. His attorney, Kathryn Walter, has been contacted for comment. No response from Walter, Sinema or Palantir has been reported.

The Republic interview gives Ammel’s version of events only. Court records confirm the date, the paintings in the pool and the upcoming court dates. His reasons, his account of the relationship and his claims about Sinema’s work come from his own statements. Heather Ammel’s lawsuit against Sinema is a separate case that is still pending.