U.S.-Iran talks gain momentum, but the nuclear question still blocks a final deal

Iran said it was reviewing a new United States proposal that could create a pathway to formally end the war in the Gulf, even as the most difficult demands from Washington remained unresolved. The proposal, now under consideration by Tehran, comes after weeks of military escalation, shipping disruption and indirect diplomacy involving Pakistan as a key communications channel between the two sides.

The immediate issue is not whether the United States and Iran are close to a comprehensive peace agreement. They are not there yet. The more precise question is whether both sides can agree to a preliminary framework that stops the war first and delays the hardest disputes, including Iran’s nuclear program and the reopening of the Strait of Hormuz, to a subsequent negotiation phase.

Iran’s foreign ministry said Tehran would convey its response soon through Pakistan. The message followed reports that Washington and Tehran were moving closer to a one-page memorandum that would formally end the conflict, begin talks on restoring shipping through the Strait of Hormuz, discuss the lifting of United States sanctions and address curbs on Iran’s nuclear activity.

United States President Donald Trump said negotiations with Iran had made progress over the previous 24 hours and that an agreement was possible. At the same time, United States demands remained unchanged on the central points that have shaped the war: Iran’s nuclear program and the closure of the Strait of Hormuz.

For global markets, the diplomatic opening has immediate consequences. Oil prices fell sharply as investors reacted to the possibility that a deal could reduce pressure on one of the world’s most important energy transit routes. For governments, shipping companies and energy importers, the key question is whether a ceasefire pathway can restore maritime flows before the nuclear and sanctions disputes are fully settled.

How could the United States proposal end the Gulf war without settling the hardest disputes?

The emerging United States proposal appears designed to separate the end of active hostilities from a final settlement of the larger strategic dispute with Iran. That distinction matters because the war, the Strait of Hormuz closure, United States sanctions, frozen Iranian funds and nuclear restrictions are connected, but they are not equally easy to resolve.

The preliminary memorandum under discussion would reportedly create a political framework for ending the war and opening a 30-day period of detailed negotiations. That would allow both governments to claim that the military conflict is moving toward conclusion while leaving unresolved issues for a formal negotiation track.

Such sequencing can help diplomacy when direct settlement is too difficult at the start. In this case, Iran has resisted demands that would appear to concede core sovereignty issues, especially on nuclear policy. The United States has insisted that Iran suspend its nuclear program and reopen the Strait of Hormuz. The current proposal appears to put those demands into a broader follow-up process rather than making them immediate preconditions for ending the conflict.

That structure creates both opportunity and risk. The opportunity is that a preliminary agreement could stop further escalation, calm energy markets and establish a monitored channel for talks. The risk is that the same ambiguity could allow either side to accuse the other of bad faith if the nuclear program, shipping access or sanctions relief are not addressed quickly.

For Washington, a phased deal could reduce pressure on United States military operations while keeping demands on Iran alive. For Tehran, it could offer a route to sanctions discussions and frozen-funds relief without immediately accepting the full United States position. For regional states, the most urgent benefit would be reduced disruption in the Gulf, particularly around shipping lanes linked to energy exports.

Why is the Strait of Hormuz still the most urgent pressure point in the Iran-U.S. talks?

The Strait of Hormuz remains the most visible economic pressure point in the conflict because it is not only a regional waterway. It is a strategic choke point for global oil and gas flows. Any sustained disruption at the strait affects shipping insurance, tanker schedules, refinery planning, fuel prices and energy security calculations across Asia, Europe and North America.

The United States wants Iran to reopen the Strait of Hormuz, while the broader proposal under discussion could eventually end competing blockades connected to the waterway. The difference between a political promise and operational reopening is significant. Ships, insurers and commodity traders need clarity on whether vessels can pass safely, whether naval escorts will continue, and whether either side retains the ability to interrupt traffic again.

United States operations linked to restoring shipping access have already become part of the diplomatic equation. A pause in the naval effort to reopen the strait signaled that Washington was giving negotiations space, but the unresolved status of the waterway continues to hang over the talks. If Iran accepts a preliminary framework but does not rapidly restore maritime access, market optimism could fade quickly.

For Iran, the Strait of Hormuz provides leverage. By controlling or disrupting access, Tehran can impose costs beyond the battlefield and force energy-importing economies to pay attention. But prolonged disruption also carries diplomatic costs for Iran, especially with countries that depend heavily on Gulf energy shipments.

The proposal’s weakness is also its potential diplomatic usefulness. By not forcing immediate resolution of the Strait of Hormuz issue inside the first memorandum, the United States and Iran may have more room to accept a preliminary deal. However, any delay in reopening the strait will keep the agreement vulnerable to market pressure and regional security shocks.

How does Iran’s nuclear program remain the central unresolved obstacle in the proposal?

Iran’s nuclear program remains the most difficult issue because it sits at the intersection of national security, sanctions policy, regional deterrence and international non-proliferation concerns. The United States wants Iran to suspend its nuclear program. Iran has denied seeking nuclear weapons and has long resisted demands it views as infringing on its sovereign rights.

The proposal under review would not appear to settle the nuclear dispute immediately. Instead, it would open a path toward negotiations that could include some restrictions on Iran’s nuclear activity. This sequencing reflects the political reality that a full nuclear settlement is harder to achieve than a ceasefire or shipping arrangement.

For the United States, the nuclear issue is not a technical side matter. It is central to Washington’s stated rationale for pressure on Tehran. Any peace structure that ends the war without clearly limiting nuclear activity may face criticism from United States allies and domestic security hawks. Israel has also pressed for far-reaching restrictions, including the removal of enriched uranium, making the nuclear question a regional security issue rather than only a bilateral United States-Iran dispute.

For Iran, agreeing too quickly to nuclear suspension could be politically costly. Tehran is likely to seek sanctions relief, access to frozen funds and recognition of its position before accepting restrictions that could be portrayed domestically as capitulation. That is why the proposal’s structure, ending the war first and negotiating nuclear curbs later, may be the only diplomatic path currently available.

The danger is that a preliminary memorandum could become a temporary pause rather than a durable settlement. If the 30-day negotiation window begins without clear nuclear benchmarks, both sides could return to coercive pressure. If it contains benchmarks that are too strict, Iran may reject the framework before talks begin.

What role is Pakistan playing as a diplomatic channel between Washington and Tehran?

Pakistan has emerged as a central communication channel in the current phase of diplomacy. Tehran is expected to send its response to the United States proposal through Pakistan, which has hosted peace-related exchanges and served as a conduit for messages between the two governments.

Pakistan’s role reflects a practical diplomatic reality. The United States and Iran can use an intermediary to reduce the political cost of direct engagement, clarify proposals and test language before public commitments are made. In a conflict where public concessions are difficult, backchannel communication can help both sides explore compromises without immediately triggering domestic backlash.

For Pakistan, the mediation role carries regional significance. A prolonged Gulf war threatens energy flows, trade routes and wider stability across West Asia and South Asia. Pakistan’s ability to maintain working channels with both sides gives it relevance in a crisis that extends beyond the Gulf.

The use of Pakistan as a channel also shows that the negotiations are still fragile. If the proposal were already politically settled, formal diplomatic mechanisms would likely be more visible. The reliance on intermediaries suggests that wording, sequencing and face-saving language remain central to the process.

The effectiveness of Pakistan’s role will depend on whether it can transmit not only messages but also workable compromise language. The distinction matters. In a high-stakes negotiation, simply passing messages is not enough. The mediator must help shape language that both sides can accept without appearing to retreat from declared positions.

Why did oil markets react so sharply to signs of progress in the Iran-U.S. proposal?

Oil markets reacted strongly because the conflict directly affects the Strait of Hormuz, one of the most important maritime routes for global energy trade. Any sign that the United States and Iran could move toward a peace framework reduces the perceived risk of prolonged disruption to crude oil and liquefied natural gas flows.

The market reaction does not mean traders believe a final agreement is guaranteed. It means the probability of immediate escalation appeared to fall after the diplomatic signals. In commodity markets, even a modest decline in geopolitical risk can move prices sharply when the affected corridor is as important as the Strait of Hormuz.

The impact extends beyond crude oil. Shipping costs, insurance premiums, refining margins and fuel-price expectations are all linked to whether Gulf routes remain open. A credible peace pathway could ease pressure on energy-importing economies, while a collapse in talks could revive concerns about supply disruption.

The market response also gives both governments an incentive to keep diplomacy alive. Falling oil prices can reduce inflationary pressure in consuming countries and ease pressure on political leaders. For energy exporters, however, the effect is more complex. Lower risk premiums can reduce prices even as stable shipping routes protect export volumes.

This is why the proposal is being watched not only by diplomats but also by central banks, refiners, shipping firms and investors. The war has become a geopolitical event with direct economic transmission channels. A one-page memorandum, if accepted, could have market consequences well beyond its legal wording.

What are the risks if Iran accepts the proposal but key demands remain unresolved?

The biggest risk is that a preliminary agreement creates a pause without resolving the conflict drivers. If Iran accepts a memorandum that ends the war but does not immediately suspend its nuclear program or reopen the Strait of Hormuz, the United States may face pressure to demand rapid compliance. If the United States pushes too hard, Tehran may accuse Washington of changing the terms of the phased process.

Another risk is that regional actors may not interpret the agreement the same way. Israel’s security concerns over Iran’s nuclear program remain central. Gulf states will focus on shipping access and energy stability. China, a major energy buyer with ties to Iran, will want a broader ceasefire and predictable trade flows. Each actor will judge the agreement through different priorities.

The proposal could also face a sequencing problem. Sanctions relief, frozen-funds access, nuclear restrictions and maritime reopening are likely to require reciprocal steps. If either side believes it is being asked to move first without sufficient guarantees, negotiations could stall.

There is also the question of enforcement. A preliminary memorandum may state political intent, but the implementation of shipping access, nuclear limits and sanctions relief requires mechanisms. Without monitoring, verification and timelines, the agreement could become vulnerable to competing interpretations.

The most constructive outcome would be a narrow but clear framework that ends active hostilities, restores maritime access in stages, begins sanctions discussions and sets a defined nuclear negotiation calendar. The least stable outcome would be a vague ceasefire that allows each side to claim victory while postponing every hard decision.

What happens next if Tehran sends a response through Pakistan?

The next phase depends on the substance of Iran’s response. If Tehran accepts the proposal in principle, the United States and Iran could move into a 30-day negotiation period focused on the full agreement. That stage would likely address the Strait of Hormuz, sanctions relief, frozen Iranian funds and nuclear restrictions.

If Iran rejects the proposal or demands major revisions, diplomacy may continue, but the risk of renewed military pressure would increase. United States President Donald Trump has linked diplomatic optimism with warnings that military action could resume if negotiations fail. That combination of inducement and threat is likely to remain a central feature of Washington’s approach.

For Iran, the response must balance external pressure with internal political constraints. Tehran may seek language that recognizes its nuclear position, avoids immediate suspension commitments and secures a pathway to economic relief. For Washington, the challenge is to secure enough Iranian movement to justify ending the war without appearing to abandon key demands.

The immediate test is whether both sides can agree on the purpose of the preliminary memorandum. If it is treated as a formal end to the war, the language will need enough clarity to reassure militaries, markets and allies. If it is treated only as an invitation to negotiate, it may not be strong enough to calm the Gulf.

The proposal has therefore created a diplomatic opening, not a settlement. The war may be moving toward a negotiation phase, but the underlying conflict remains intact until the nuclear program, the Strait of Hormuz, sanctions and security guarantees are addressed in enforceable terms.

What are the key takeaways from Iran’s review of the United States proposal to end the Gulf war?

• Iran said it was reviewing a new United States proposal that could formally end the Gulf war while leaving nuclear and Strait of Hormuz issues for later negotiations.
• The proposal could open a 30-day negotiation period covering shipping access, United States sanctions, frozen Iranian funds and curbs on Iran’s nuclear activity.
• Iran is expected to send its response through Pakistan, which has served as a key diplomatic channel between Washington and Tehran.
• The Strait of Hormuz remains central because disruption to the waterway has affected global energy shipping and oil-market sentiment.
• United States President Donald Trump said a deal with Iran was possible, while still pressing Tehran to suspend its nuclear program and reopen the Strait of Hormuz.