The Dual Blockade Trap: Washington Built a Crisis in Hormuz That No Deal Can Quickly Undo

Let me start with a number. Twenty thousand. That is the approximate count of seafarers who have been stuck on ships in the Persian Gulf since late February, according to Lloyd's List Intelligence¹. Two thousand vessels. Nearly eight weeks. No sign of that changing soon, as NPR reported⁴ this week. Those 20,000 people are the human residue of something that has morphed from a military operation into an economic event with its own internal logic, and I think that logic now constrains Washington more than it constrains Tehran.

Here is the short version of how we got here. On February 28, the US and Israel launched airstrikes against Iran, including the assassination of Supreme Leader Khamenei. Iran retaliated by closing the Strait of Hormuz, attacking commercial shipping, and laying sea mines. The US spent weeks trying to reopen the strait by force, failed, pivoted to a ceasefire on April 8, sent JD Vance to Islamabad for 21-hour talks that collapsed on April 12¹¹, and then — crucially — imposed its own naval blockade of Iranian ports on April 13. So now we have what is aptly described as a "dual blockade": Iran blockading the Gulf, the US blockading Iran, and the strait effectively closed to nearly everyone.

The scale of the disruption is historically unprecedented. The IEA has called it "the largest supply disruption in the history of the global oil market." Brent crude surged past $126 per barrel¹ at its peak. Physical spot prices reportedly approached $150 per barrel⁵, far above futures. The EIA's April outlook⁷ estimated that Gulf states collectively shut in 9.1 million barrels per day of crude production in April — production that literally cannot leave because storage is full and the export route is closed. UNCTAD projects global merchandise trade growth decelerating from 4.7% in 2025 to between 1.5% and 2.5% in 2026⁶. The Philippines declared a national energy emergency. India's ceramics industry shut down. Europe is staring at a gas crisis echoing 2022. This is not a targeted sanctions regime. It is a global economic earthquake.

The question I keep returning to is whether the US blockade — the specific decision on April 13 to layer America's own maritime enforcement on top of Iran's closure — is producing leverage proportional to the damage it is inflicting. I do not think it is. And the evidence for why lies in three specific dynamics that are already playing out.

First, Washington's allies have refused to participate. This is not an ambiguous signal. Germany, the UK, France, Spain, Italy, Japan, South Korea, and Australia all rejected Trump's call to join a Hormuz coalition⁸. British PM Keir Starmer was blunt: "We're not supporting the blockade." An Axios report⁹ captured the diplomatic temperature: responses from allies ranged from skepticism to "hell no." A later joint statement from seven US allies¹⁰ expressed theoretical support for reopening the strait but, as Axios noted, "does not include any commitment to send naval vessels." This matters enormously for the coercive-diplomacy theory of the blockade. The classic argument is that when you disrupt a global commons, affected third parties become pressure agents on your adversary, because they want the disruption resolved on your terms. That requires those third parties to coordinate with you. They are not coordinating with you. They are pursuing an independent UK-France track for a "defensive multilateral mission" that is explicitly distinct from the US blockade. The 1990 Gulf War coalition this is not.

Second, the blockade has not produced a negotiating breakthrough — it has frozen diplomacy. The timeline is revealing. The Islamabad talks lasted 21 hours and collapsed on April 12, with the nuclear issue as the primary sticking point¹⁹. Vance said Iran was "unyielding" on nuclear commitments. Trump then imposed the blockade. Iran immediately declared it a ceasefire violation¹⁷ and set lifting the blockade as a precondition for resuming talks¹². Iran's UN envoy stated that "as soon as Washington ends the naval blockade, I think the next round of negotiations will be held." Trump extended the ceasefire indefinitely but kept the blockade in place. A second round of talks in Islamabad was supposed to happen this week; it has not materialized²⁰. Iran's Foreign Ministry says there are "no negotiations with the Americans on the agenda." The blockade was supposed to accelerate Iran toward a deal. Instead, it gave Tehran a new precondition and a new grievance that has hardened its bargaining position.

Third — and this is the structural point that I think matters most — the damage is already reorganizing global energy infrastructure on timelines Washington does not control. Saudi Arabia has ramped pipeline flows through the East-West pipeline from 770,000 barrels per day pre-war to 2.9 million barrels per day¹⁴. Iraq is reopening its long-dormant pipeline to Turkey¹³. Gulf producers are exploring new pipeline routes to Oman, Jordan, and Egypt. As Oxford Economics' Lucila Bonilla told CNBC¹³: "The war has also accelerated investments in bypass routes... That means that Iran, and its main strategic leverage, weakens." Here's the twist: this reorganization does not just weaken Iran's leverage. It also weakens Washington's ability to credibly offer a return to the status quo ante as an inducement. If Gulf states build permanent bypass infrastructure — and the economic incentive to do so has never been stronger — then "reopening Hormuz" becomes a less valuable prize to offer at the negotiating table. The market is solving the problem around the diplomats.

Now, the strongest counterargument is that Iran's dependency on Hormuz is far more acute than anyone else's. Iran exports 90% of its crude via Kharg Island through the strait, and its only alternative terminal — Jask — handled just one two-million-barrel shipment¹⁸ before the war. Treasury Secretary Bessent claimed that Kharg Island storage will be full within days¹⁷, forcing production shutdowns. This is a real and severe constraint on Iran. I take it seriously.

But the question is not whether the blockade hurts Iran — it clearly does. The question is whether Washington can convert that pain into a durable, politically sustainable agreement. And on that question, the precedents are not encouraging. The JCPOA, negotiated under severe financial sanctions, required asset releases and sanctions relief that were immediately characterized as capitulation and collapsed within three years. A Hormuz blockade exit will require even more visible concessions: formally lifting a naval blockade of a global commons, potentially releasing frozen assets, and constructing verification mechanisms for nuclear, missile, and regional-proxy commitments — all while Iran demands reparations, sovereignty recognition over the strait, and the release of $6 billion in frozen funds¹¹. Any deal that meets even a fraction of those demands will face domestic opposition in Washington. Any deal that doesn't will be rejected by Tehran. The blockade has not solved this structural mismatch. It has widened it.

I want to be precise about my assessment. The blockade is inflicting real economic pain on Iran. But it is also inflicting massive collateral damage on the global economy — the Dallas Fed estimates¹⁵ a 2.9 percentage-point annualized hit to global GDP in Q2 2026 — while simultaneously alienating allies, freezing diplomacy, and accelerating structural changes in energy infrastructure that diminish the value of what Washington can eventually offer. The US has built a pressure instrument it cannot easily remove without looking like it capitulated, and cannot maintain indefinitely without causing damage that dwarfs the strategic objective. That is not leverage. That is a trap.

What to watch: the clearest indicator of whether I am right or wrong is whether a second round of Islamabad talks produces an agreement with a sequenced, verifiable implementation timeline within the next 30 days. CNN reports²⁰ that Trump is sending Witkoff and Kushner to Pakistan, but Iran says no negotiations are planned. If Washington ends up lifting or softening the blockade as a precondition to get Iran to the table — which is exactly what Tehran is demanding — that will confirm the blockade's coercive logic has inverted. Pressure was applied to extract concessions. Instead, the pressure itself became the concession that must be surrendered first.