Iran Escalates Against the US to Break a Hormuz Stalemate Its Economy Can't Outlast
Six months into the war, the Strait of Hormuz has settled into a shape that suits Washington better than Tehran. The US Navy blockade keeps most Iranian oil off the water, while American escorts push a thin stream of tankers through the strait at great expense. There have been no formal talks for months. Iran’s leadership has looked at that picture and decided to change it by force.
The past ten days show how. A monthlong lull ended when US aircraft hit Iranian rocket launchers on an island in the strait, saying they were being readied to fire mines into the shipping lanes. Iran answered with missiles at US bases in Jordan. Then it took the fight to sea. Overnight into September 9 the US said one of its warships had evaded an Iranian ballistic missile attack, and that it destroyed five Iranian tankers in the Gulf of Oman and near Kharg Island in response. Tehran fired around 20 missiles at the Al-Azraq air base in Jordan, went after US Navy ships and claimed hits on 10 merchant vessels near the strait. By its own count that was the heaviest day of attacks on shipping since the war began. A Greek-owned tanker carrying about two million barrels of Iraqi fuel oil caught fire; a cargo ship was struck off Iraq’s al-Faw peninsula; another vessel was seen listing at anchor off Dubai.
Why a Stalemate Is a Losing Position for Tehran
Iran closed the strait to push the cost of the war onto the United States and onto world energy markets. For a while that worked. Brent is back above $100 a barrel, up roughly 65% this year, and US diesel set a record at the pump earlier this month.
The trouble for Tehran is that the closure has stopped getting worse for Washington. The blockade keeps getting worse for Iran. The escort operation moves only a handful of ships and costs a fortune, but it has capped the oil price and blunted Iran’s main weapon. Meanwhile petroleum exports have mostly stopped. Inflation is close to 90%. The rial hit a record low of about 2.2 million to the dollar on September 2, and this week the government raised some gasoline prices because of fuel shortages. That’s a sensitive move in a country where economic pain already put crowds on the streets late last year (the crackdown that followed killed thousands).
Washington wants to keep the conflict economic. A blockade is a slow tool; it rewards whoever can wait longer, and Pete Hegseth said in August the Navy could keep it up indefinitely. Iran’s leaders seem to have concluded that waiting is the one thing they can’t afford.
Two Clocks
Tehran runs on an economic clock. It’s betting that Donald Trump runs on an electoral one.
The midterms are on November 3, fuel prices are hurting, and the war is unpopular. Trump told reporters this week the war would end “immediately after the election” because Iran can’t hold out. Iranian officials read the same calendar the other way round. According to Bloomberg Economics analyst Dina Esfandiary, many in Iran’s leadership believe this administration only responds to threats and escalation, and that it gets more nervous about a hotter war as the vote gets closer.
That explains the new vocabulary in Tehran. Mohsen Rezaei, the new secretary of the Supreme National Security Council, says Iran’s posture toward US ships and bases has been fundamentally recalibrated. Parliament speaker Mohammad Bagher Ghalibaf, who led the earlier ceasefire talks, says the era of proportionate responses is over. The idea is to make each US strike cost more than the last one, and to do it fast enough that the bill lands before November.
The Restricted Zone Is Aimed at Insurers
Rezaei’s other announcement will matter longer. Iran says it will declare a restricted zone that starts at the US blockade line and runs into the Gulf toward the big loading terminals. Any ship entering without coordinating with Tehran goes on an Iranian sanctions list, with knock-on effects for its insurance and its future passage through the strait.
Iran can’t patrol that zone. Its boats and aircraft would be exposed to US attack the moment they tried. It doesn’t need to. The real audience is the underwriter and the P&I club, because a vessel blacklisted by Tehran is a harder risk to cover, and the escort trickle only works as long as owners and insurers accept that risk. Put the zone next to the corridor Iran says it has mapped with Oman (entry and exit through Iranian waters, under Iranian management) and the message to shipping is simple. Route through us or carry the exposure yourself.
Oman has been noticeably more guarded about the corridor than Tehran.
Where the Escalation Can Go Wrong
Neither side wants a return to the full-scale fighting of March and April. The International Crisis Group’s Hamidreza Azizi argues that neither can sit between war and truce forever either. Iran’s plan needs escalation sharp enough to move Washington without handing it a reason to restart the air campaign. That’s a narrow band, and it’s getting narrower.
Trump says there’s been movement at Pickaxe Mountain, a centrifuge assembly site the first strikes left alone, and has warned Iran not to “get cute.” The IAEA board has reported Iran to the UN Security Council on a resolution backed by the US, Britain, France and Germany. US intelligence reportedly doubts Iran can keep producing missiles once current stocks run down, given damage to its factories and the blockade on parts. Reports that US aircraft were damaged in Jordan (Trump denies it) show how one lucky hit could flip the White House calculation. And last month Iranian insiders told the Financial Times that US assets in Europe and the subsea cables in the strait were on the list if Washington escalated. Any of those would carry the war well beyond Hormuz.
Tehran’s terms haven’t moved. President Masoud Pezeshkian and Foreign Minister Abbas Araghchi say Iran will negotiate, but only after the US lifts the blockade and returns to the June memorandum. Washington wants the strait open first. The escalation is Iran’s attempt to get back to those June terms with enough pressure behind it that the White House says yes before the vote.
Tehran has until November 3 to find out if the bet pays.