Trump Says Iran Nuclear Talks Proceeding at 'Rapid Pace' as Iran Threatens New Fronts

On June 1, 2026, President Donald Trump posted on Truth Social that indirect talks with Iran were continuing at a "rapid pace" [1]. Hours earlier, an Iranian news outlet affiliated with the Islamic Revolutionary Guard Corps had announced Tehran was suspending talks and preparing to open "other fronts" in the war [1]. The two statements captured in miniature the contradiction at the center of the most consequential diplomatic effort in the Middle East since the original Iran nuclear deal: both sides claim to want a deal, and both sides are simultaneously preparing for what happens if there is none.

The stakes extend far beyond Washington and Tehran. A successful agreement would end a shooting war that began on February 28, 2026, reopen the Strait of Hormuz — through which roughly 20% of the world's oil passes — and begin dismantling a nuclear program that intelligence agencies say is weeks from producing weapons-grade material. A failure could trigger an escalation involving proxy forces across four countries, a permanent closure of critical maritime chokepoints, and the first new nuclear-armed state in decades.

From War to Table: How Negotiations Reached This Point

The road to the current talks runs through months of military escalation and diplomatic false starts. On June 22, 2025, the United States struck three Iranian nuclear facilities — Fordow, Natanz, and Isfahan — under Operation Midnight Hammer, using fourteen GBU-57A/B Massive Ordnance Penetrator bunker-buster bombs delivered by B-2 Spirit stealth bombers [2]. The strikes were part of the Twelve-Day War, which the Trump administration framed as a response to Iran's advancing nuclear capabilities.

Iran retaliated by closing the Strait of Hormuz and activating its regional proxy network. By October 2025, Iran officially terminated the JCPOA — the 2015 nuclear deal it had continued to nominally observe even after the first Trump administration withdrew in 2018 [3]. Full-scale war between the U.S. and Iran erupted on February 28, 2026 [4].

Pakistan emerged as the mediator. On April 8, 2026, Islamabad brokered a two-week ceasefire [5]. The first formal peace talks — the Islamabad Talks — followed on April 11–12, 2026. They lasted 21 hours across three rounds, beginning with indirect communication before shifting to direct talks [5].

The U.S. delegation numbered roughly 300 people, led by Vice President JD Vance alongside special envoys Steve Witkoff and Jared Kushner [6]. Iran sent a 70-member team headed by parliamentary speaker Mohammad Bagher Ghalibaf and Foreign Minister Abbas Araghchi [6]. Pakistan's mediating team was led by Prime Minister Shehbaz Sharif, Field Marshal Asim Munir, and Deputy Prime Minister Ishaq Dar [5].

Those marathon talks ended without a deal [7]. A second round followed, but by late April, Iran pulled back from negotiations, citing "contradictory U.S. positions" and Israel's ongoing military operations in Lebanon [8]. It took weeks of Pakistani shuttle diplomacy to bring both sides back. By late May 2026, a draft memorandum of understanding began circulating — the document now at the center of the "rapid pace" claim.

The Enrichment Gap: What's Actually Being Negotiated

The central technical question is uranium enrichment — how much Iran can enrich, for how long, and what happens to its existing stockpile.

Under the 2015 JCPOA, Iran was capped at enriching uranium to 3.67% — suitable for civilian power generation but far below the roughly 90% purity needed for a weapon [9]. After the first Trump administration withdrew from the deal in 2018, it demanded "zero enrichment" — a position Tehran rejected outright [9]. Iran then steadily increased enrichment, reaching 60% by 2021 and reportedly touching 83.7% briefly before the 2025 strikes [10].

Source: Arms Control Association / IAEA Reports

Data as of May 1, 2026CSV

The current negotiations have moved away from the zero-enrichment demand. According to Axios, the U.S. proposed a 20-year moratorium on uranium enrichment during the April 2026 talks in Islamabad [11]. Iran countered with a "single digit" year period [11]. Secretary of State Marco Rubio confirmed in May that negotiations were addressing "both Iran's enrichment capabilities as well as its enriched material" [12].

The draft memorandum of understanding defers the hardest nuclear questions to a 60-day negotiating window that would begin after the MoU is signed [13]. During that window, the two sides would negotiate the disposition of Iran's stockpile — currently estimated at 440.9 kg of uranium enriched to 60%, enough for approximately 7–8 weapons if further enriched to weapons grade [10] — along with the terms and duration of any enrichment moratorium.

Iran has stated that while it is open to limiting enrichment levels, surrendering the capability entirely is a non-starter [11]. The Bulletin of the Atomic Scientists noted in February 2026 that Iran's "claimed right to enrich uranium" could be the basis for a new deal, rather than an obstacle to one [14].

The Money: Sanctions Relief and the $300 Billion Question

The financial architecture of the proposed deal is as contentious as the nuclear provisions.

The draft MoU reportedly includes several layers of economic relief for Iran. Upon signing, $24 billion in frozen Iranian assets would be released, with $12 billion available immediately [15]. Iran estimates that the removal of sanctions on oil sales alone could generate nearly $10 billion in government revenue over the 60-day negotiating window [13]. Sanctions waivers would allow Iran to sell oil freely and resume commercial shipping through the Strait of Hormuz [16].

Source: Fortune / NYT / Euronews

Data as of May 30, 2026CSV

The most politically explosive element is a proposed $300 billion "international investment fund" for Iran's postwar reconstruction, first reported by The New York Times on May 28, 2026 [17]. Iran had originally demanded "reparations" for damage inflicted during U.S. bombing campaigns. The Trump administration rebranded the concept as an "investment fund" to avoid domestic political fallout [17]. An Iranian official described it as a "reconstruction programme" that would be formalized in the final agreement [17].

On May 29, Trump posted on Truth Social: "No money will be exchanged, until further notice," adding conditions that Iran must forswear nuclear weapons, open the Strait of Hormuz without tolls, and remove all sea mines [16]. As of June 1, Trump has not signed the memorandum [16].

Iran's Threat to Open 'Other Fronts'

The IRGC-linked announcement about "other fronts" is not an empty phrase. Iran's proxy network — often called the "Axis of Resistance" — spans multiple countries and has demonstrated operational capacity throughout the 2026 war.

Iraqi militias have been the most active, claiming over 290 attacks in the first eleven days of the war across seven Iraqi governorates. These groups possess drones, rockets, and the capability to deploy ground forces across borders [18].

The Houthis in Yemen have intensified their Red Sea campaign, targeting commercial shipping in the Bab al-Mandeb Strait. They have also begun assembling and manufacturing arms domestically, reducing their dependence on Iranian supply lines [18]. Iran has signaled that the Houthis could orchestrate a full blockade of Bab al-Mandeb, closing a second critical maritime chokepoint [4].

Hezbollah in Lebanon has launched missile barrages against Israel, framing its attacks as retaliation, but has stopped short of an all-out war. As of late May, Hezbollah had "activated its forces and signaled readiness without crossing the threshold into all-out war" [18].

Source: Foreign Policy / Times of Israel

Data as of Mar 10, 2026CSV

The IRGC itself has threatened to extend the conflict "beyond the region" if the U.S. and Israel resume attacks, stating that any future retaliation would "feature many more surprises" [19]. Iran has explicitly declared that "crossing the red lines in Lebanon and Gaza" would constitute "direct war" [4].

The operational readiness of these proxies gives Iran meaningful escalation leverage at the negotiating table — and a credible threat if talks collapse.

The Credibility Problem: Why Iran Doubts Any U.S. Promise

From Tehran's perspective, the fundamental obstacle to any agreement is not technical but political: the United States has already broken one deal.

When the first Trump administration withdrew from the JCPOA in May 2018, the IAEA had repeatedly verified that Iran was in compliance with the agreement's terms [3]. Iran continued to observe the deal's limits for a year after the withdrawal before beginning to exceed them. The reimposition of maximum-pressure sanctions devastated Iran's economy despite its compliance.

This history creates a structural credibility deficit. Any agreement signed by the current administration is an executive agreement, not a treaty ratified by the Senate. A future president could withdraw from it — as Trump did from the JCPOA — with the stroke of a pen. Iran's negotiators have raised this point repeatedly: what guarantee exists that the next administration will not simply undo whatever is agreed upon?

The current negotiations have not publicly addressed this question with concrete mechanisms. No escrow arrangements, international enforcement triggers, or multilateral backstops have been reported in the draft MoU. The 60-day negotiating window may address structural guarantees, but the absence of any public discussion of this issue suggests it remains unresolved.

For Iran, the 2018 experience provides a rational basis for skepticism that goes beyond posturing. The country dismantled centrifuges, shipped out enriched uranium, and submitted to intrusive inspections — and received in return a reimposition of sanctions harsher than those that preceded the deal [3]. Any new agreement that does not address this precedent will struggle to command Iranian compliance.

Congress, the Constitution, and the Treaty Question

The deal faces domestic legal obstacles as well. Senate Republicans have argued that any Iran agreement must be submitted to the Senate for ratification as a treaty, as required by the Constitution's Treaty Clause [20]. Senator Ted Cruz introduced the Iran Nuclear Treaty Act, which would require the president to submit any renewed nuclear deal to Congress [20].

The administration has refused to commit to treaty ratification, mirroring the Obama administration's approach with the original JCPOA, which was structured as an executive agreement and a UN Security Council resolution rather than a formal treaty [20]. Critics argue this structure is precisely why the deal was so easily undone in 2018.

Separately, Congress has voted down nine War Powers Resolution measures since March 2026 that would have required congressional authorization for the continued use of force against Iran [21]. On May 1, the White House asserted that "hostilities that began on February 28, 2026, have terminated" — a legal claim that, if accepted, would moot any War Powers challenge [12].

The tension between executive authority and congressional oversight remains unresolved, and any deal signed without Senate ratification will carry the same structural vulnerability as the JCPOA.

What the Region's Powers Want — and Fear

Three regional states — Israel, Saudi Arabia, and the UAE — have the most direct security stake in the outcome.

Israel has taken the hardest line. Prime Minister Benjamin Netanyahu stated that any final agreement must "eliminate the nuclear danger," which he defined as dismantling Iran's enrichment sites and removing all enriched material from Iranian territory [22]. During a reported phone call with Trump, Netanyahu expressed concern about specific conditions in the draft MoU [23]. Israel's position effectively demands more than even the original JCPOA achieved, and far more than the current draft contemplates.

Saudi Arabia has called for the talks to "address all issues" contributing to Middle East instability "over the past decades" — a broad formulation that encompasses Iran's proxy support, missile program, and nuclear ambitions [22]. The kingdom's interest is partly economic: prolonged closure of the Strait of Hormuz directly threatens Saudi oil exports.

The UAE has been the most publicly critical of Iran. Its ambassador to the U.S. called for the "unconditional reopening of the Strait of Hormuz," demanded that Iran pay reparations for damage, and insisted on a "wide agreement" covering armed proxies and Iran's ballistic missile program [22]. None of these states have been granted formal veto power over the deal's terms, but the Trump administration's May 2026 push to expand the Abraham Accords — urging Saudi Arabia, Qatar, and others to normalize relations with Israel — suggests their concerns are being woven into the broader diplomatic architecture [22].

The Breakout Clock: What Happens If Talks Fail

If negotiations collapse, the nuclear timeline becomes the dominant strategic variable.

U.S. intelligence assessments estimate that Iran is 2–4 weeks from producing enough weapons-grade uranium (90% enriched) for a single weapon, using its existing stockpile and surviving centrifuges at Fordow [10]. Building an actual deliverable nuclear warhead would require an additional 6–18 months for weapon component fabrication and missile integration [10]. Some analysts place a more conservative estimate at two and a half years for a fully operational weapon absent foreign assistance [24].

A significant complication: IAEA inspectors have been unable to maintain continuous monitoring of Iran's nuclear facilities since early March 2026, when they were evacuated following the escalation of coalition strikes [10]. Without on-the-ground verification, all breakout estimates carry substantial uncertainty.

Military options remain on the table. The June 2025 strikes on Fordow used the GBU-57A/B MOP — a 30,000-pound precision-guided bomb capable of penetrating 200 feet underground, deliverable only by the B-2 Spirit stealth bomber [2]. Fourteen of these weapons were used across three facilities. Israel has separately indicated it could use F-15s escorted by F-35s to deliver multiple 5,000-pound bunker busters against Fordow [2].

But the 2025 strikes did not eliminate Iran's nuclear capability — they set it back. Iran retains its enriched uranium stockpile, technical knowledge, and enough surviving infrastructure to reconstitute. The Bulletin of the Atomic Scientists warned in March 2026 that the enriched material creates a "residual nuclear weapons capability" regardless of further military action [25].

The Gap Between Words and Reality

The phrase "rapid pace" does not describe a negotiation that has produced a signed document. As of June 2, 2026, the memorandum of understanding remains unsigned. Trump has publicly added conditions beyond what the draft contains. Iran has threatened to suspend talks while simultaneously participating in them through Pakistani intermediaries. IAEA inspectors cannot verify the state of Iran's nuclear program. Congress has not been consulted on the deal's terms, and constitutional challenges await any agreement reached without Senate ratification.

What exists is a framework — a 60-day cessation of hostilities, a commitment to reopen the Strait of Hormuz, an outline for sanctions relief, and a deferred negotiation on the nuclear question. Whether that framework becomes an agreement depends on answers to questions that remain, for now, unanswered: How much enrichment will Iran retain? What guarantees will prevent another 2018-style withdrawal? Will Congress have a role? And if talks fail, how quickly does a diplomatic crisis become a nuclear one?

The clock is running on all of these questions simultaneously.