The basics, quickly, because the rest depends on them. The Strait of Hormuz sits between Iran and Oman — 21 miles wide at its narrowest, with a shipping lane in each direction only about 2 miles across — connecting the Persian Gulf to the open ocean.[1] Through that gap normally moves roughly 20% of the oil the world consumes, up to 30% of internationally traded fertilizer, and a comparable share of the world's LNG.[2] Since fighting began at the end of February 2026, that flow hasn't trickled — outbound fertilizer shipments through the strait to destinations outside the Gulf, per the World Trade Organization's own trade data, "came to a standstill" and have "remained close to zero since," with limited, costlier rerouting through Saudi Arabia's Red Sea port at Yanbu unable to match prior volumes.[3]
But the strait itself isn't what this piece is about. Wars along this coastline have opened and closed before; the water hasn't gotten any narrower. What's actually different this time is sitting in Washington: an $87.6 billion war-funding request that the White House sent to Congress in June, and what happened to it — and what got attached to it — in the months since.
OMB Director Russell Vought's June letter to Speaker Mike Johnson asked for $87.6 billion: roughly $67 billion for the Pentagon (including $21 billion in munitions and $17.3 billion in "operational costs"), $11.1 billion for farmers ($10 billion in temporary economic assistance for 2026 plantings, $1.1 billion for Florida winter-storm recovery), $1.4 billion for the Ebola response in central Africa, and $1 billion for "the final design and construction of a modernized Penn Station in New York City."[4] House Republicans countered in July with their own $95 billion package — which added stricter voter-registration requirements to the bill.[5] None of that — not the train station, not the elections language — has anything to do with a strait between Iran and Oman. That's not an oversight. A war-funding bill is one of the few kinds of legislation nobody in Congress can afford to be seen voting against, which makes it exactly the vehicle a rider rides when it can't pass on its own.
The mechanism, named plainly. A must-pass bill doesn't just fund what it says it funds. It becomes the only door in the building that's guaranteed to open, and anything that needs to get through Congress without surviving its own vote gets carried through that door instead. Rep. Thomas Massie called the bundled agricultural aid "ironic" on the record.[6] Senate Appropriations Committee's ranking Democrat, Patty Murray, made the accounting explicit: the administration "launched a reckless war without Congress authorization and should not be asking taxpayers to pick up the tab."[7] The House passed a version 216-214 in July, along party lines, through budget reconciliation.[8] The Senate has not — Democrats have blocked cloture, withholding the 60 votes required unless the administration accepts constraints on the war itself.[8] The House that passed its version then went home. Massie, on the same account, quantified it directly: the House would be in session only 4 full days between July 24 and November 8 — "100 paid days off versus 4 full working days plus 4 travel (half) days."[17] As of this writing it remains exactly that: unresolved, not a settled outcome, a live example of the mechanism rather than a closed case.
Before the war, Gulf states supplied a genuinely large share of the world's nitrogen fertilizer — Iran, Qatar, Saudi Arabia, the UAE, and Bahrain together accounted for roughly 34% of global urea trade and about 30% of global ammonia trade in 2024, with Qatar's QAFCO complex alone exporting 5.5-6 million tonnes of urea and ammonia a year and Saudi Arabia's SABIC-linked producers another 4-5 million.[9] That's the baseline. Since the standstill WTO documented, urea prices went from roughly $400 a metric ton to over $850 in April — more than doubling — before falling back to $453 by June as buyers found workarounds and demand adjusted.[2] US retail urea, a related but distinct market, was still running $655-664 a ton in late August — elevated well above pre-war levels, though down for five straight weeks, with traders citing the still-constrained strait as the reason prices haven't fallen further.[10] The United Nations has since offered to help facilitate fertilizer transport specifically through the strait — itself a real, current sign of how serious the flow interruption still is.[10]
Here's the part that doesn't fit the easy version of this story: it's not really the American grocery shopper who pays for this. Multiple independent analyses of the disruption agree the closure is unlikely to cause major price increases at a US grocery store — the US produces most of its own food and has enough buffering capacity to absorb the shock at the register.[11] The real transmission runs somewhere else. The UN's own Food and Agriculture Organization estimates cereal producers globally could see income losses of up to 5% in 2026, with effects still being felt through 2030[11] — which is exactly the risk the $10 billion in "temporary economic assistance for crops planted in 2026" inside the supplemental is a government-acknowledged hedge against. Farmers, not shoppers, are the domestic name on this bill. And the sharper edge of it falls outside the US entirely: East Africa draws roughly a third of its fertilizer from the Gulf, the single most exposed region on Earth for this input, and India's IFFCO has already begun cutting domestic urea production because the imported gas it needs as feedstock costs too much.[12] A region with no equivalent $10 billion riding any bill absorbs the same disruption with none of the cushion.
India imports about 88% of the crude oil it uses, and roughly 70% of that ran through Hormuz before the war -- a dependency separate from, and on top of, the fertilizer exposure already covered above.[23] The IEA called what followed the February strikes "the largest supply disruption in the history of the global oil market." India's crude imports fell 23% in March alone. The rupee, already sliding on unrelated tariff pressure, dropped a further 4.9% to 93 to the dollar. Eleven weeks after the strait closed, four separate fuel-price hikes passed roughly Rs 7.5 a liter on to Indian consumers directly.[24] India has spent the months since diversifying toward the US, Russia, West Africa, and Fujairah, UAE -- routes that bypass the strait entirely -- and has cut its Hormuz-dependent share of imports roughly in half. That response is itself a data point: an entire country's energy-import strategy got rebuilt in six months because one channel became unreliable.
The Centre for Research on Energy and Clean Air tracked fossil-fuel costs across 41 African countries from March through August 2026: 32 of them, net importers, paid a combined $21.9 billion more; nine exporters earned $21.6 billion more.[25] Add it up continentally and the net is close to zero -- $0.3 billion, a rounding error on the roughly $90 billion the continent imports in Gulf fuel every year. That number is also close to meaningless, because it isn't the same countries on both sides of the ledger. Kenya, Tanzania, Ghana, Senegal, and Rwanda -- the same East Africa already named above as the region most exposed on fertilizer -- absorbed higher fuel and freight costs, wider current-account deficits, and real pressure on foreign-exchange reserves on the oil side too. Nigeria, Angola, Libya, and Algeria captured $18.1 billion of the gain between them. Egypt alone paid $5.2 billion -- more than Nigeria, the continent's largest oil producer, earned. Nigeria is the sharpest version of the whole mechanism in one country: Africa's biggest producer of crude, and still dependent on imported refined fuel, meaning the same shock that filled its export revenue also raised its own pump prices.[25]
A chokepoint shock doesn't hit a global average. It sorts. The same six months that cost Kenya, Tanzania, Ghana, Senegal, and Rwanda real currency reserves handed Nigeria, Angola, Libya, and Algeria a combined $18 billion gain -- the identical price movement, opposite outcome, depending entirely on which side of the import/export line a country already sat on. India's 23% import collapse and Japan's own Q2 electricity-price jump (up 30% year-on-year, tied directly to the same disruption) are the same mechanism at the demand side.[26] None of this required anyone to target anyone. What happens to any given country next depends entirely on what that economy already was before the shock arrived.
Crops need potassium as much as nitrogen, and the US has almost none of its own — Canada holds the overwhelming majority of accessible reserves and supplied roughly 80% of the roughly 12 million tonnes of potash the US imported in 2024, nearly all of it mined in Saskatchewan.[18] That trade normally crosses the border tariff-free under the US-Canada-Mexico agreement. During the broader US-Canada tariff fight, Washington put a 25% tariff on Canadian potash before cutting it to 10% — a rate that has held even through the next round of tariff escalation in July 2026, while other goods kept climbing.[18] Saskatchewan's own premier, Scott Moe, made the reason explicit: the province would tariff US alcohol at 50% in retaliation, but not potash or oil, citing the risk to jobs and farmers on both sides of the border.[18] Analysts estimate a real potash disruption would wipe out tens of billions of dollars in US farm revenue in a single season.[18] Put the two fertilizer legs side by side: nitrogen is exposed through a war neither government fully controls, and has collapsed close to zero. Potassium is exposed through a trade dispute both governments do control, and both sides have so far chosen, deliberately, not to touch it. Same underlying vulnerability — a food system that looks domestic and secure has real foreign chokepoints running through it — but one is a war outcome and the other is a standing policy choice, renewed every time neither side pulls the trigger.
The $1.4 billion for Ebola response in the same supplemental isn't decoration either. The outbreak in the Democratic Republic of Congo has passed 3,000 confirmed deaths, with the World Health Organization warning the true toll may run three times higher and seeking $1.3 billion in additional funding as school reopenings risk accelerating transmission.[13] That's a real, live emergency — which is precisely why bundling it into a contested war-funding fight is a genuine risk to the emergency itself, not just an accounting curiosity. When the vehicle stalls, everything riding in it stalls too.
The US has stated, consistently, for decades, that it guarantees freedom of navigation through the Strait of Hormuz — a commitment backed by a permanent naval presence in the Gulf since 1949 and reinforced by the Carter Doctrine's explicit 1980 declaration that the US would use military force to defend its access to the region.[14] The current conflict is testing what that commitment actually costs to keep, in real time: deployments have been extended into 2027, with reporting pointing to yearslong military maintenance backlogs from the extension, and diesel — a fuel that runs both farm equipment and the trucks that move farm output — sitting at its highest price since 2022.[15] The gap between a seventy-year standing claim and what sustaining it costs in a live conflict is not a rhetorical question. It has a dollar figure, and that figure is the bill Congress is still fighting over.
There was, briefly, a real path back to normal. The US and Iran signed an interim deal on June 18 declaring an "immediate and permanent termination of military operations" and opening a 60-day negotiating window — Iran agreed to clear mines from the strait and let ships pass, the US agreed to end its naval blockade, lift sanctions, and issue oil-export waivers. It collapsed almost immediately: President Trump declared the pact "over" on July 7, nineteen days later, and Tehran maintains Washington violated it within 48 hours of signing.[19] Each side blames the other for why the strait never actually reopened; neither account is disinterested, and the piece doesn't adjudicate between them — the collapse itself is the fact that matters.
The most recent escalation is direct rather than economic. The US and Iran each struck three vessels over the weekend of September 5-6 — American forces hit three Iranian oil tankers; Iran launched ballistic missiles at US warships. A day later, Iran's Supreme National Security Council announced plans for a new "exclusion zone" reaching from the US naval blockade line into the Persian Gulf, warning that any vessel identified attempting to transit the strait would be added to Iran's own sanctions list.[20] Brent crude was trading near $97 a barrel as of this writing; Goldman Sachs has put the range at $80 if flows normalize soon to $120 if the attacks intensify further, with the bank's own commodities researchers describing a "growing risk of shipping disruptions widening."[21] Set against that: Iran says a deal with Oman on a temporary safe shipping route through the strait is now days away — geographic coordinates agreed, a joint coordination center proposed — though Tehran insists the strait itself won't reopen until Washington returns to its own June commitments first.[22] Both are true at once. That is what "unresolved" actually looks like in real time, not a placeholder for a story that will have settled by the time anyone reads this.
Iranian-linked hacking attempts, meanwhile, have expanded past water utilities to US telecoms and energy infrastructure directly — a domestic cost with no line item and no bill to bundle it into at all.[16]
The same leverage-through-scarcity logic, running in reverse: a new scheduled Arctic shipping route is starting to dilute the Suez Canal's own chokepoint dependence for China-to-Europe cargo. See "A Cargo Ship Just Sailed From China to England Through the Arctic in 20 Days Instead of 40."