Why Trump Halted the U.S.-Iran Deal: Inside the Nuclear Demands That Stalled Peace

Second, he thought the nuclear restrictions in the draft were too weak. The text included Iran's pledge not to pursue nuclear weapons, but Trump wanted tougher, verifiable limits on enrichment and more concrete provisions for handling Iran's highly enriched uranium . According to administration officials, he was focused on "strengthening elements that are crucial to him, particularly concerning Iran's nuclear materials" .

Behind the scenes, Trump faced conflicting pressures. Reopening the Strait of Hormuz would help lower U.S. gasoline prices—a pressing domestic concern—but doing so without a strong nuclear deal risked a backlash from Iran hawks in his own party, who viewed any concessions to Tehran as unacceptable .

Specific conditions Trump added

The exact changes Trump sent to Tehran have not been disclosed in full, but reporting from Axios, The New York Times, and other outlets indicates these demands :

• Stronger, verifiable nuclear limits: Beyond a temporary moratorium on enrichment, Trump insisted on concrete mechanisms to verify and enforce the halt. This reportedly included demands that Iran not move its enriched uranium stockpiles and that the material be handled to U.S. satisfaction .
• No deferral of nuclear talks: Trump objected to the MOU's structure, which would have reopened the Strait of Hormuz first while delaying nuclear negotiations. He wanted nuclear terms addressed immediately, not in a follow-on phase .
• A deal serving U.S. interests: The White House did not release the full list of conditions but reiterated that Trump "will only accept an agreement that serves U.S. national interests" and meets his core demands .

How Tehran responded

Iran's reaction unfolded on multiple fronts throughout May 2026:

• May 18: Tehran submitted a revised proposal through Pakistani mediators that U.S. officials called insufficient and warned it "risks war resumption" . Iran offered minor improvements but continued to insist that any comprehensive agreement include full sanctions relief and access to frozen assets.
• May 24: Iranian state media outlets publicly challenged U.S. descriptions of the draft MOU. They claimed that nuclear issues would be handled in "separate negotiations" after the MOU was signed and that Iran would retain control over the Strait of Hormuz, contradicting U.S. assertions that the strait would be unrestricted .
• Late May: Working-level negotiators from both sides tentatively agreed on the draft terms, subject to final approval from both Trump and Supreme Leader Khamenei . Following Trump's rejection, Iran received the revised U.S. version, which initiated a new round of negotiations expected to extend over several days or longer .

Key terms of the proposed MOU

Though the specific text was never released, multiple reports from Axios, Euronews, Iran International, and Xinhua describe the draft's outline :

• Timeline: The deal would extend the ceasefire for 60 days, with the possibility of extension by mutual consent . That period was meant to launch in-depth nuclear negotiations. Earlier reports referenced a potential 20-year moratorium on enrichment for a permanent deal, but the immediate MOU was an interim ceasefire-extension measure .
• Enrichment requirements: Iran would commit to a moratorium on nuclear enrichment. Whether this meant a complete immediate halt or a pause pending broader talks remained disputed between the two sides .
• Strait of Hormuz provisions: Shipping through the Strait of Hormuz would be unrestricted—no tolls, no attacks, and no obstructions—with Iran required to remove all mines within 30 days. The U.S. would proportionally lift its naval blockade as commercial traffic resumed .
• Sanctions relief: The U.S. would lift sanctions and issue waivers to allow Iran to sell oil freely. Billions of dollars in frozen Iranian funds would be released, with relief tied to verifiable Iranian compliance under a "relief for performance" framework .
• End of hostilities: The MOU would formally declare an end to active warfare between the two countries .

The deal's central dispute remained unresolved: U.S. officials said the MOU included nuclear restrictions, while Iranian officials insisted nuclear issues would only be addressed in subsequent negotiations .

The gas-price pressure on Washington

The stalled deal had direct consequences at U.S. pumps. Iran's closure and mining of the Strait of Hormuz—through which roughly 20% of global oil passes—sent crude and gasoline prices sharply higher .

• The average U.S. gasoline price surpassed $4 per gallon by late March 2026 and continued climbing as negotiations dragged on .
• By late April 2026, Brent crude exceeded $110 per barrel, a 3% jump attributed directly to failed diplomacy. Prices had briefly dipped below $100 earlier that month when the April 7 ceasefire was announced .
• ABC News reported the national average reached $4.23 per gallon by late April, driven by market uncertainty over the strait .
• The Washington Times noted inflation hit 3.8% in April 2026, the highest level in three years, tied to the conflict's energy costs .

Trump met with oil and gas executives to discuss managing a prolonged blockade's effects on consumers but publicly denied that cost-of-living concerns were forcing him to settle for a weak deal . The fundamental mechanism remains: as long as the Strait of Hormuz is contested, global oil supply is constrained, keeping gasoline prices elevated. A deal reopening the strait would likely bring immediate price relief; a collapse risks further spikes.