Trump Threatens Oman Amid Strait of Hormuz Negotiations and Expired Iran CeasefireDeep Dive

What Happened

On Monday, August 18, 2026, United States President Donald Trump publicly threatened to bomb Oman if the Gulf nation "gets in the way" of a peace deal between the US and Iran. This statement, made during an interview with Fox News, marks the second such threat against Oman, a long-standing US ally, within five months. The threat coincided with the expiration of a 60-day Memorandum of Understanding (MoU) between Washington and Tehran, which had aimed to facilitate peace talks and halt hostilities but largely failed to achieve its objectives. Simultaneously, Iranian officials announced they were nearing an agreement with Oman regarding the management of maritime traffic through the strategically vital Strait of Hormuz, a development that appears to have excluded direct US involvement.

The initial MoU, signed on June 17, had stipulated a cessation of hostilities and the reopening of the Strait of Hormuz for 60 days. However, this arrangement quickly deteriorated due to disagreements over control of shipping routes. Iran launched strikes on vessels following Oman-issued, US-approved routes in late June, leading to renewed US strikes on Iranian targets for nearly two weeks. Following these escalations, Iran refused further direct talks with the US, citing violations of the MoU, and instead initiated separate negotiations with Oman, mediated by Qatar, to establish a new shipping mechanism for the strait. On Monday, Tehran's Foreign Ministry spokesperson Esmaeil Baghaei confirmed that an understanding had been reached with Oman on a new transit route map, with a joint declaration pending.

What the Evidence Establishes

Evidence from multiple sources establishes that the Strait of Hormuz is a critical global chokepoint, through which approximately one-fifth of the world's oil and liquefied natural gas (LNG) supplies transited before the US-Israel war on Iran began on February 28. Iran closed the strait in early March, severely disrupting global energy markets and causing Brent crude prices to surge from around $66 a barrel pre-conflict to over $100 on several occasions, reaching $91.22 on Tuesday, August 19. The 60-day MoU between the US and Iran, intended to de-escalate the conflict and reopen the strait, expired on Monday without renewal, largely due to fundamental disagreements over maritime control and Iran's nuclear program.

The US has maintained a naval blockade on Iranian ports in and around the strait, with the US Navy reportedly establishing a "wall of steel" that has reduced traffic to less than ten percent of pre-war levels, according to Fox News. This blockade has been accompanied by US strikes on Iranian military targets, including missile and drone sites, naval capabilities, and coastal surveillance positions, particularly in late June and July following Iranian attacks on commercial vessels. Conversely, Iran has launched retaliatory strikes on US military assets and energy infrastructure in neighboring countries, including Oman. The ongoing conflict has significantly strained US munitions inventories, with reports indicating substantial depletion of ATACMS, Precision Strike Missiles, Tomahawk missiles, and Patriot interceptors, raising concerns about US readiness.

Where the Accounts Conflict

A primary point of conflict centers on President Trump's claim of direct communication channels with Iran's Islamic Revolutionary Guard Corps (IRGC). During his Fox News interview on Monday, Trump asserted that his administration had "opened a direct backchannel for talks with Iran’s Islamic Revolutionary Guard Corps." However, an IRGC spokesman explicitly denied this claim, telling Iran’s semi-official Tasnim News that "There are no talks taking place between IRGC officials and the Americans, and this lie by Trump is merely fantasies caused by the delusions and nightmares he has suffered as a result of defeat and desperation in the war." This direct contradiction highlights a significant divergence in the public narratives presented by the US administration and Iranian military leadership regarding the extent and nature of diplomatic engagement.

Another area of implicit conflict lies in the portrayal of the US blockade and its effectiveness. Fox News reports President Trump claiming the US Navy has established a "wall of steel" blockade, restricting traffic to under ten percent of pre-war levels. While Al Jazeera also notes the US has established its own blockade on Iranian ports, Iranian officials, as reported by Fox News, "reject Trump's assertions of total control, warning of a prolonged conflict as international shipping routes face severe disruptions." This suggests a difference in how effectively and comprehensively the US blockade is perceived, with Iran implying a less absolute control than Trump's statements suggest, potentially to maintain a narrative of resilience and continued operational capacity.

Context and Stakes

The Strait of Hormuz is a narrow waterway, approximately 21 miles wide at its narrowest point, connecting the Persian Gulf with the Arabian Sea and the Gulf of Oman. Its strategic importance cannot be overstated, as it is the sole maritime passage for a substantial portion of the world's crude oil and natural gas exports, particularly from major producers like Saudi Arabia, Iran, UAE, Kuwait, and Iraq. Any disruption to traffic through the strait has immediate and severe repercussions for global energy markets, as evidenced by the surge in Brent crude prices following Iran's initial closure in March and subsequent attacks on shipping. The ongoing US-Iran conflict, which began on February 28 with US-Israeli attacks on Iran, has transformed the strait into a central flashpoint, with both nations asserting control and engaging in military actions.

Oman, a long-standing US ally with a nearly 200-year relationship and multiple cooperation treaties, has historically maintained a neutral stance in regional conflicts, often serving as a mediator between Washington and Tehran. President Trump's repeated threats to bomb Oman, despite its neutrality and allied status, underscore the heightened tensions and the US administration's frustration with any perceived obstruction to its foreign policy objectives. An Iran-Oman agreement on the Strait of Hormuz, mediated without direct US intervention, could be seen by Washington as undermining its demands for Iran to relinquish control of the waterway, potentially legitimizing Iran's position and demonstrating US "impotence," as suggested by Professor Laleh Khalili of the University of Exeter. The broader stakes involve global energy security, the stability of international shipping, and the potential for a wider regional conflict, alongside the erosion of US diplomatic influence in the Gulf.

What to Watch Next

The immediate focus will be on the finalization and public announcement of the joint declaration between Iran and Oman regarding the new shipping route through the Strait of Hormuz. Foreign Ministry spokesperson Esmaeil Baghaei stated on Monday that the two countries had reached an "understanding" and were preparing a joint declaration, which would outline a mechanism to safeguard the sovereign rights of both littoral states while ensuring safe passage for commercial vessels. The specifics of this agreement, particularly concerning any potential fees or operational control mechanisms, will be crucial. US Secretary of State Marco Rubio and President Trump have both previously warned against Iran charging tolls, with Trump even pledging to declare the Strait of Hormuz a "territory" of the US, indicating a strong US reaction to any perceived Iranian assertion of control or revenue generation.

Another critical development to monitor is the US response to the Iran-Oman agreement and the expiration of the US-Iran MoU. With the 60-day window for negotiations now closed and no broader deal reached on Iran's nuclear program or sanctions relief, the Trump administration faces a choice between extending negotiations, escalating pressure on Tehran, or continuing the current state of conflict. The Pentagon's reported depletion of munitions inventories may influence strategic decisions, potentially pushing for a diplomatic resolution or a more targeted, less resource-intensive approach. Furthermore, any further military actions by either the US or Iran in the Strait of Hormuz or surrounding regions will signal a significant escalation or de-escalation of the ongoing conflict, directly impacting global energy markets and regional stability.

Bottom Line

The US-Iran conflict over the Strait of Hormuz has intensified following the expiration of a 60-day ceasefire and President Trump's renewed threat against Oman. While the US and Iran remain deadlocked on maritime control and nuclear issues, Iran and Oman are advancing a bilateral agreement for managing the critical waterway. This development challenges Washington's demands for Iran to relinquish control and highlights the diminishing effectiveness of US-led diplomatic efforts in the region. The global energy market remains highly volatile, with oil prices reflecting the ongoing instability and the threat to shipping. The coming days will reveal the specifics of the Iran-Oman deal and the Trump administration's strategic response, which could either de-escalate tensions or lead to further military and economic confrontation in a region already grappling with significant geopolitical shifts and strained military resources.

The US administration's stance, including Trump's declaration of intent to claim the Strait of Hormuz as US territory, signals a hardening position that directly conflicts with international law regarding natural waterways and the sovereign claims of Iran and Oman. The diplomatic isolation of the US in this specific negotiation, as highlighted by experts, suggests a potential weakening of its regional influence. The depletion of US military stockpiles, as reported by Reuters and analyzed by the Center for Strategic and International Studies, adds another layer of complexity, potentially limiting the scope of sustained military operations and increasing pressure for a resolution, albeit one that aligns with US strategic interests.