From Negotiations to Naval Blockade: The Full Story of U.S.-Iran Talks and the Strait of Hormuz Crisis
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| From Negotiations to Naval Blockade: The Full Story of U.S.-Iran Talks and the Strait of Hormuz Crisis |
Background: A Broken Deal and Rising Pressure
To understand where things stand today, you have to go back to 2018. Upon returning to office in 2025, U.S. President Donald Trump restored his maximum pressure campaign against Tehran while also initiating negotiations on its nuclear program — the first direct U.S.-Iran talks since he withdrew the United States from the JCPOA nuclear deal in 2018.
The 2015 deal, known as the Joint Comprehensive Plan of Action (JCPOA), had placed restrictions on Iran's uranium enrichment in exchange for sanctions relief. After America's exit, Iran accelerated its nuclear activities, eventually enriching uranium to 60% purity — dangerously close to the 90% level required for a nuclear weapon.
The backdrop of these discussions is a complicated history; a nuclear deal was initially struck in 2015 between Iran and world powers, including the U.S. Trump withdrew from the deal in 2018, leading Iran to escalate its uranium enrichment to 60% purity.
Phase One: Trump's Letter and the Opening Rounds (March–May 2025)
In March 2025, Trump took a direct step: he sent a personal letter to Iran's Supreme Leader Ayatollah Ali Khamenei proposing negotiations, with a roughly two-month deadline for acceptance. In exchange, the U.S. offered to lift sanctions and normalize relations, while warning that failure to negotiate would result in military strikes.
Khamenei's initial reaction was silence. According to reports, Khamenei changed his mind about the negotiations after his advisors warned that the threat of war with the United States and the deepening economic crisis could bring down the government. By the end of March, the Iranian leadership had sent a reply expressing readiness for nuclear negotiations.
The first round of talks opened in Muscat, Oman on April 12, 2025. Iran's delegation was led by Foreign Minister Seyed Abbas Araghchi, granted full authority by Khamenei. The U.S. side was represented by Special Envoy Steve Witkoff. A key point of contention was the format itself — the U.S. preferred direct talks while Iran insisted on an indirect approach, mediated by Oman.
A second round took place in Rome on April 18, and a third round followed on April 26–27. U.S. Secretary of State Marco Rubio emphasized that the U.S. does not envision Iran enriching nuclear material domestically and instead insisted on the importation of nuclear fuel for a civilian energy program. Iran's position was the opposite — it insisted that its right to enrich uranium was guaranteed under the Nuclear Non-Proliferation Treaty.
By early May, optimism was cautiously present. Vice President J.D. Vance described the talks as "so far, so good" and said there was a deal to be made that would reintegrate Iran into the global economy while preventing it from obtaining a nuclear weapon.
The Twelve-Day War: When Diplomacy Collapsed (June 2025)
The diplomatic track was abruptly overtaken by military action. On June 13, 2025, Israel launched major air strikes against Iranian nuclear and military facilities amid ongoing talks between the U.S. and Tehran. Iran responded within hours with large-scale missile and drone attacks on Israeli cities.
Then the United States entered directly. U.S. President Donald Trump announced on June 21 that the United States had struck three major nuclear sites inside Iran as part of what he called "Operation Midnight Hammer." The sites targeted were Fordow, Natanz, and Isfahan — the backbone of Iran's nuclear infrastructure. In response, Iran launched missiles against a U.S. military base in Qatar, though there were no reported American casualties.
Nuclear negotiations between Iran and the United States broke down in June 2025, raising concerns that time was running out to prevent Iran from attaining a nuclear weapon.
Phase Two: A New War and New Talks (February 2026)
Despite the June ceasefire, the broader conflict was far from over. Tensions between Iran and the U.S. intensified in January 2026 amid Iran's ongoing crackdown on the 2025–2026 anti-government protests. The U.S. began amassing air and naval assets in the region at a level not seen since the outset of the 2003 invasion of Iraq.
On February 28, 2026, the United States and Israel launched airstrikes on Iran, targeting military and government sites, assassinating Supreme Leader Ali Khamenei and other Iranian officials, and inflicting civilian casualties. The surprise attacks were launched during negotiations between Iran and the U.S. Iran responded with missile and drone strikes against Israel, U.S. bases, and U.S. allies in the Middle East, and the closure of the Strait of Hormuz, disrupting global trade.
New rounds of indirect, Oman-mediated talks resumed in Geneva during this period. Iran reportedly offered only to suspend enrichment for three to five years — a timeframe that would extend beyond Trump's time in office. Iran also indicated it was willing to eliminate its stockpile of 407 kilograms of 60% enriched uranium. However, the positions remained far apart. According to the Wall Street Journal, U.S. envoys Steve Witkoff and Jared Kushner demanded Iran destroy its three main nuclear sites — at Fordow, Natanz, and Isfahan — and deliver all remaining enriched uranium to the U.S.
The Islamabad Summit: 21 Hours, No Deal (April 11–12, 2026)
The most dramatic moment of the entire diplomatic process came in Islamabad, Pakistan. The talks — which lasted for 21 hours — began on Saturday, April 11, as the two sides looked to reach a deal to end the war. It was the first face-to-face engagement between the U.S. and Iran since 2015, when the Obama administration negotiated the JCPOA. They were also the highest-level discussions since the 1979 Islamic Revolution.
Tehran's demands included control of the Strait of Hormuz, payment of war reparations, a ceasefire across the region including in Lebanon, and the release of its frozen assets abroad. The U.S. delegation, led by Vice President Vance, would not accept these terms.
Vance told reporters: "The bad news is that we have not reached an agreement, and I think that's bad news for Iran much more than it's bad news for the United States of America." He said Iran chose "not to accept our terms" and that the U.S. needs to see a "fundamental commitment" from Tehran not to develop nuclear weapons.
Iran's foreign ministry spokesperson offered a different characterisation. He noted that "these talks were held after 40 days of imposed war, in an atmosphere of mistrust and suspicion" and that no one should have expected a deal in a single meeting.
Trump's Response: The Naval Blockade
Within hours of the talks collapsing, Trump moved to escalate pressure. President Donald Trump said the U.S. Navy would block "any and all ships trying to enter, or leave, the Strait of Hormuz" in a post on Truth Social, adding that the blockade would remain until Iran opens the Strait to all traffic.
The scope was then clarified by military command. U.S. Central Command specified: "The blockade will be enforced impartially against vessels of all nations entering or departing Iranian ports and coastal areas, including all Iranian ports on the Arabian Gulf and Gulf of Oman." However, it added that American forces "will not impede freedom of navigation for vessels transiting the Strait of Hormuz to and from non-Iranian ports."
Trump also announced that the U.S. Navy would pursue vessels that had paid what he called illegal tolls to Iran to cross the strait. Iran's decision to close the strait to oil tanker traffic had already caused severe economic damage to countries that rely on Middle Eastern crude, and led to a sharp surge in oil prices globally — including in the United States.
Some U.S. allies, including NATO members Britain and France, refused to join the blockade effort. Iranian officials responded defiantly, warning the U.S. Meanwhile, Pakistan, which hosted the failed talks, said it would continue to play a role in peace efforts. Foreign Minister Ishaq Dar urged both sides to uphold the ceasefire.
What the Strait of Hormuz Means
The stakes around this waterway are enormous. The strait lies between Oman and Iran and links the Gulf with the Gulf of Oman to the south. It is just 21 miles wide at its narrowest point, with the shipping lane only two miles wide in each direction. About a fifth of the world's total oil consumption — some 18–19 million barrels per day — passes through it.
OPEC members Saudi Arabia, Iran, the UAE, Kuwait, and Iraq export most of their crude through the Strait. Qatar, the world's biggest LNG exporter, sends almost all of its gas through it, accounting for roughly a quarter of global LNG use.
Where Things Stand
As of today, no agreement has been reached. The war continues, the Strait remains contested, and negotiations have stalled. Trump is also reportedly considering the resumption of limited military strikes on Iran in an attempt to break the stalemate, according to the Wall Street Journal. Vance, for his part, stated that "the ball is in Iran's court" while Oman's foreign minister urged both sides to extend the ceasefire and keep talking.
The facts, in summary: two years of on-and-off negotiations, one 12-day war, a second round of strikes, 21 hours of marathon diplomacy in Islamabad, and a naval blockade — yet no deal. The core issues — Iran's right to enrich uranium, its control over the Strait of Hormuz, and the question of reparations — remain unresolved. Both sides continue to negotiate from positions shaped less by compromise and more by the pressure of ongoing conflict.
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