Trump's Hormuz Blockade: How the US Navy Plan Targets China's Energy Lifeline

At 13:34 UTC on Sunday 12 April 2026, President Donald Trump announced on Truth Social that the United States Navy would start blockading the Strait of Hormuz with immediate effect. The move came hours after 21 hours of direct talks between Vice President JD Vance and the Iranian delegation in Islamabad collapsed without an agreement. It lands in the middle of a fragile 14-day ceasefire scheduled to expire on 22 April and marks the sharpest escalation in the war that began on 28 February with US and Israeli strikes on Iran.

U.S. Central Command (CENTCOM) has then announced that beginning on Monday, April 13 at 10:00 Eastern Time, in accordance with the proclamation issued by President Donald J. Trump, the U.S. Navy and other military forces will begin a blockade against vessels of all nations entering or departing Iranian ports and coastal areas, including all Iranian ports on the Persian Gulf and Gulf of Oman. CENTCOM additionally states that the blockade will not impede freedom of navigation for vessels transiting to and from Non-Iranian ports via the Strait of Hormuz.

The China Angle: Energy as a Weapon of War

Reading the blockade only as a response to Iranian extortion misses the wider picture. Roughly half of China's crude oil imports and close to one third of its LNG imports normally transit the Strait of Hormuz. Qatar alone supplies around 30% of Chinese LNG. Before the war, Beijing was pulling about 5.35 million barrels a day through the strait. By mid-March that figure had collapsed to roughly 1.22 million barrels, almost entirely Iranian crude paid for in yuan.

Every further tightening of the strait therefore lands first and hardest on Chinese industry. The White House is fully aware of this. The pattern is already familiar from Venezuela, where sustained US pressure on Caracas was designed in part to cut off another discounted supplier for Chinese refiners. Striking Iran and choking Hormuz completes the logic. It forces China to replace lost barrels on the open market at far higher prices, drains its foreign currency reserves, and makes its already fragile post-pandemic recovery harder to sustain.

In this reading, a second major objective of the war, alongside rolling back Iran's nuclear program, is to weaken China indirectly by raising the cost and cutting the reliability of its energy imports.

The 50% Tariff Threat

Trump made the China dimension explicit in the same Fox interview. Asked by Bartiromo whether his earlier warning about a 50% tariff on countries supporting Iran militarily was aimed specifically at Beijing, he confirmed it was, and said other countries could also be targeted. He then referenced reports, which he said he did not fully trust, suggesting that China had delivered shoulder-fired anti-aircraft missiles to Iran. He added that he doubted Beijing was still doing so, although he conceded it may have happened in the first days of the fighting. His bottom line was blunt. Any country caught shipping military equipment to Iran, China included, would face a 50% tariff on its exports to the United States.

Layered on top of an already tense trade relationship, a 50% duty would work as a second pressure point stacked on the energy squeeze. One mechanism raises the cost of the oil and gas China still manages to import. The other raises the cost of the goods China sells in return.

State of the strait before the new blockade

On the water, the picture is a tangle of contradictions. Three fully loaded supertankers left the Gulf on Saturday according to ship tracking data, the first confirmed exits since the ceasefire took effect five days earlier. Two US destroyers also transited the strait ahead of mine clearance operations, which US Central Command described as a first since the start of the war. Iranian state media denied any such transit had occurred.

At the same time, Sultan Al Jaber, the CEO of Abu Dhabi National Oil Company, said earlier this week that the strait is effectively still closed, with Iran conditioning and restricting traffic despite the truce. Shipment volumes remain down by more than 90% compared with pre-war levels, equivalent to roughly 10 million barrels per day of lost crude flow.

Brent has been trading well above pre-war levels for weeks. Several analysts now warn that a fully enforced US blockade layered on top of the Iranian closure could drive prices toward 130 USD per barrel, and Iraqi officials have floated scenarios as high as 300 USD. Qatar remains under force majeure on LNG, grocery supply chains across the Gulf Cooperation Council are under severe strain, and Bahrain has just received a 5.4 billion USD currency support line from the UAE to stabilise its finances.

What to Watch Next

Two questions will define the coming week.

First, whether the 14-day ceasefire survives until 22 April. Vance stated that the Iranians had refused US terms and that the Islamabad channel was closed. Pakistan has offered to host a new round, but neither side has shown any flexibility on the two core issues of Iran's nuclear program and control of the strait.

Second, how Beijing reacts. China has so far stayed clear of direct involvement, limiting itself to diplomatic statements urging restraint while quietly continuing to buy Iranian crude in yuan. A hard US blockade combined with a 50% tariff would force a decision that the Chinese leadership has worked hard to postpone.

For now, the only certainty is that the Strait of Hormuz has moved from being a global economic chokepoint to being the central front of a wider contest over who controls the energy flows that keep Asian industry running.