The US Treasury Secretary promises to isolate Iran until its government collapses. His argument distorts the history of Tehran, mistakes suffering for surrender and ignores the geography that makes complete isolation impossible.
Scott Bessent has used the pages of the Financial Times to declare an “economic D Day” against Iran. The US Treasury Secretary is not proposing another limited round of sanctions. He is threatening every country, bank, refinery, shipping company and commercial intermediary that preserves Iran’s remaining connection to the world.
Bessent calls it “the single greatest financial offensive ever marshalled against an adversary”. Its purpose, he writes, is to sever every economic lifeline until Tehran stands alone. Governments that continue trading with Iran are warned that they may share its isolation.
This is presented as an alternative to further American military force. Yet its declared objective is to collapse a government by destroying the economy upon which more than 90 million people depend. The weapons are financial. The language, purpose and foreseeable consequences belong to warfare.
America unquestionably has the power to inflict enormous damage. Bessent does not establish that damage will produce surrender, regime collapse or any political result Washington can control.
Tehran’s answer to Bessent
Iran rejects Bessent’s description of the campaign as legitimate international isolation. Foreign Ministry spokesman Esmaeil Baghaei said the proposed measures went beyond economic warfare against Iran. By threatening secondary sanctions against companies and governments elsewhere, he argued, Washington was asserting “extraterritorial sovereignty” over independent members of the United Nations.
That is the Iranian objection in its broadest form. The United States is not merely deciding what American companies may do. It is claiming the right to punish a Chinese refinery, an Iraqi energy buyer, a Pakistani trader or a Gulf bank for commerce that takes place outside American territory. Washington describes access to its financial system as a privilege that may be withheld. Tehran describes the same power as an attempt to subordinate the sovereignty of every country ordered to participate.
At his weekly press conference, Baghaei said Iran had not started the war but would not allow it to end on what he called the aggressor’s terms. He said Tehran would use all available capacities to resist the economic campaign. His language places Bessent’s offensive within the continuing war, rather than treating sanctions as a peaceful instrument separate from it.
Foreign Minister Abbas Araghchi offered a historical answer. He recalled the “crippling sanctions” announced fourteen years ago, the “maximum pressure” campaign begun eight years ago and the demand for “unconditional surrender” five months ago. Each had failed, he said, and the newly advertised financial offensive would do the same.
Iran’s official response
Baghaei says the secondary sanctions assert American authority over other sovereign states, not only Iran. Araghchi presents the campaign as the latest name for a coercive policy that has repeatedly inflicted damage without achieving its declared political result.
A distorted history of Tehran
Bessent begins with the Tehran Conference of 1943, where Roosevelt, Churchill and Stalin coordinated the war against Nazi Germany. He takes Churchill’s question about bringing “the greatest pressure to bear on the enemy” and transfers the word “enemy” from the Third Reich to Iran.
The comparison does the moral work before the argument has begun. Iran is placed in the position of Nazi Germany. Trump inherits the authority of the wartime Allies. Countries that trade with Tehran become appeasers.
But Bessent has selected only the part of the Tehran record that serves him. The declaration signed on December 1, 1943 thanked Iran for assisting the Allied war effort and promised respect for its “independence, sovereignty and territorial integrity”. Iran was not the enemy at Tehran. It was an occupied country whose territory and railways helped supply the Soviet front.
The history becomes more uncomfortable ten years later. Britain and the United States helped overthrow Prime Minister Mohammad Mossadegh after he nationalised Iran’s oil industry. A declassified American memorandum records Britain proposing a coup to replace Mossadegh with a government considered more “reliable”, while acknowledging that London saw little prospect of an oil settlement with him.
This history explains why the same events are understood so differently in Tehran and Washington. American officials describe a campaign against a dangerous government. Many Iranians see another external power claiming the authority to determine their political future while seeking control over the conditions under which their country may sell its principal resource.
What happened at Tehran
The United States, Britain and the Soviet Union recognised Iran’s help in the war and pledged to maintain its independence, sovereignty and territorial integrity. Bessent invokes Allied power at Tehran while overlooking the promise made to Iran there.
Damage is not an endgame
Bessent says American military power has significantly dismantled Iran’s capabilities and weakened its nuclear programme. Iran has plainly suffered grave damage. Facilities have been destroyed, commanders killed, infrastructure disrupted and the currency driven lower.
But “significantly dismantled” is not an inventory of what remains, while “endgame” is a prediction presented as an operational fact. Destroying installations does not destroy scientific knowledge, every dispersed weapon, hidden component or production line. The condition of important nuclear stocks remains uncertain.
The recent history of pressure also contradicts Bessent’s confidence. When Washington left the nuclear agreement in 2018, Iran was subject to strict limits and intrusive monitoring. Tehran says the United States violated the bargain first by restoring sanctions while Iran was complying, and that its later reduction of commitments was a declared and reversible response permitted by the agreement’s dispute provisions. Washington disputes that interpretation and treats the expansion as evidence of nuclear intent.
Iran maintains that enrichment is permitted for peaceful purposes under the Nuclear Non Proliferation Treaty, that it has not decided to build a weapon and that its religious and strategic doctrine rejects one. Its critics point to enrichment at 60 per cent, advanced centrifuges and unresolved safeguards questions as evidence that the programme has moved far beyond ordinary civilian requirements. By May 2025, the International Atomic Energy Agency estimated a stockpile of more than 9,200 kilograms of enriched uranium, including 408.6 kilograms at 60 per cent. The agency documented the material and the loss of monitoring continuity; that is not the same as proving a political decision to manufacture a bomb.
The sequence cannot be wished away. Maximum pressure did not produce maximum compliance. Whatever judgment is made about Tehran’s subsequent actions, the nuclear programme expanded after the United States abandoned the agreement intended to contain it.
Who damaged Iran’s economy?
Bessent describes a corrupt regime that has reduced what could have been one of the world’s strongest economies to ruin. Iranian economists and newspapers themselves debate corruption, privileged networks, multiple exchange rates, unstable policy and barriers to investment. The Iranian account, however, is that no honest economic history can separate these internal weaknesses from decades of external restrictions deliberately intended to prevent normal banking, energy sales, investment and technology transfer.
But Bessent cannot blame the regime alone while boasting that Trump has “decimated” Iran’s economy. American policy is designed to reduce oil revenue, obstruct banking, deter investment, depreciate the currency and increase the cost of ordinary trade. These are not unintended effects. They are the means by which the policy is supposed to work.
World Bank assessments have attributed Iran’s economic reversals to several forces, including sanctions, oil shocks, the pandemic and structural constraints. No single cause explains the condition of the economy. Bessent nevertheless removes American pressure from the history of the damage at the very moment he celebrates its power to cause more.
Nor does economic pain prove political capitulation. A state may survive while its citizens become poorer, its industries deteriorate and its dependence on a few foreign buyers deepens. Resilience is not prosperity. But poverty and surrender are not the same event.
The people inside the financial battlefield
Bessent claims that complete financial isolation can avoid further American force and enlarge freedom. He does not explain how destroying Iran’s commercial connectivity distinguishes its rulers from its population.
Banking restrictions reach far beyond military procurement. They make food, medicine, machinery and transport more expensive even where humanitarian exemptions formally exist. Banks and carriers abandon lawful transactions because the compliance risk is too great. Inflation destroys wages and savings. Businesses lose components and credit. Public services weaken as revenue falls.
If the purpose is to make life intolerable until the government falls, civilian hardship is not collateral damage. It is the transmission mechanism of the policy.
Trade is not appeasement
Bessent calls countries maintaining relations with Iran its “enablers”. Their trade is reduced to appeasement, as though governments could have no interests outside Washington’s judgement.
Iraq requires Iranian gas and electricity. Pakistan shares a long border and extensive informal commerce. Turkey has energy and transport interests. Gulf states must consider physical security as well as access to American finance. China wants secure supplies and rejects the proposition that Washington possesses jurisdiction over trade between Chinese and Iranian companies.
Buying Iranian oil does not mean endorsing every action of the Revolutionary Guards. If commercial relations amount to approval of everything a government does, much of international trade becomes morally impossible.
Bessent describes Iran’s regional relationships exclusively as a “network of proxies” perpetuating terror. Tehran uses a different vocabulary: an axis of resistance supporting Palestinians, Lebanese, Yemenis and Iraqis against occupation, Israeli military power and the American security system. Neither description is neutral. One turns every allied movement into an Iranian instrument; the other places every action within a struggle of resistance.
Iran has supplied money, weapons, training and political support to armed organisations whose forces have attacked American and Israeli targets, while attacks attributed to members of these movements have also killed civilians. Tehran argues that it supports allies with their own leadership, constituencies and reasons for fighting. Washington and Israel argue that Iranian assistance makes Tehran responsible for the violence those groups conduct. The degree of operational control differs by organisation and episode and cannot be settled merely by applying the word “proxy”.
In any event, buying Iranian petroleum does not make a third country an accomplice to every act committed by Iran or by an organisation it supports. If trade constitutes endorsement of all state conduct, the principle would make normal relations with many powers impossible.
The offensive runs into China and Russia
China is the central obstacle to Bessent’s promised isolation. It purchased about 1.38 million barrels a day of Iranian crude in 2025, more than 80 per cent of Iran’s seaborne oil exports, according to Kpler data reported by Reuters. Much of the trade passes through independent refineries with limited exposure to America.
Beijing has moved beyond verbal objection. In May 2026, China’s Ministry of Commerce prohibited recognition or enforcement of American sanctions against five Chinese refiners accused of buying Iranian oil.
American financial power still matters. Large Chinese banks that require dollar clearing will calculate their exposure carefully. Smaller refiners may demand larger discounts, reducing Tehran’s revenue. Washington can make the trade more expensive and dangerous.
But it cannot assume Chinese obedience. Measures limited enough to avoid confrontation with Beijing may fail to isolate Iran. Measures strong enough to threaten Iran’s survival would have to reach important Chinese institutions and could provoke retaliation across supply chains, technology or American commercial interests.
Russia is still less likely to cooperate. It is already organised around sanctions resistant trade, has its own confrontation with Washington and gains strategically when American coercion pushes Iran deeper into Eurasian networks. Neither Moscow nor Beijing needs to make sanctions harmless. They need only preserve sufficient trade for the Iranian state to survive.
Geography cannot be sanctioned away
Bessent’s objective is to sever “every economic lifeline”. Iran’s geography makes the word “every” implausible.
Iran borders Iraq, Turkey, Armenia, Azerbaijan, Turkmenistan, Afghanistan and Pakistan. It has access to the Caspian Sea, the Persian Gulf and the Gulf of Oman, and transport connections towards Russia, Central Asia and China. Goods can move through formal crossings, barter, local currencies and informal networks that long predate modern sanctions.
These routes have severe limits. Roads and railways cannot replace unrestricted tanker exports. Evasion increases transport costs, creates corruption and leaves Iran dependent on buyers able to demand steep discounts. Geography can keep the country functioning. It cannot make isolation painless.
That distinction defeats Bessent’s promise. To prevent collapse, Iran does not need normal prosperity. It needs enough oil revenue, cross border trade and external support to maintain the state. America can constrict those connections. It cannot abolish Iran’s neighbourhood.
The economic war can return through Hormuz
Bessent describes what America can do to Iran but barely considers what Iran can do to the economic system around it.
In the final quarter of 2025, about 21.6 million barrels of petroleum liquids crossed the Strait of Hormuz each day. The US Energy Information Administration estimates that the flow fell to 4.9 million barrels a day during the second quarter of 2026. Saudi Arabia and the United Arab Emirates possess pipelines that bypass the strait, but their spare capacity is limited. Qatar’s liquefied natural gas has still fewer alternatives.
Iran need not control every vessel or close the channel permanently. Mines, missiles, seizures and uncertainty can raise insurance costs, deter crews and delay shipping. A passage may remain physically navigable while becoming commercially prohibitive.
Tehran has explicitly linked Bessent’s offensive to Gulf exports. Mohsen Rezaei, secretary of Iran’s Supreme National Security Council, has warned that continued economic war could mean no oil leaving Hormuz or the wider Gulf. He said support from another country for the American campaign would be treated as a warlike act.
Washington will describe this as coercion against civilian commerce. Tehran presents it as deterrence: if the United States uses the international economy as a weapon and asks neighbouring states to participate, Iran will not allow the costs to fall upon Iranians alone. Whether it could enforce a complete halt is uncertain, and an attempt could provoke massive retaliation or alienate Asian customers. Nevertheless, the warning destroys Bessent’s claim that financial isolation necessarily avoids force.
Two systems of coercion
Washington warns that trading with Iran may cost a country access to American finance. Tehran warns that joining Washington’s offensive may expose Gulf commerce and infrastructure to retaliation. Bessent’s wager does not have only one source of risk.
The illusion beneath the offensive
The United States can blacklist more vessels, close accounts, seize cargoes and frighten companies away from Iran. The rial may fall further. Iranian families will pay more for necessities. The state will receive less for every discounted barrel it manages to sell.
That is considerable power. It is not the same as control over the political result.
Bessent’s Financial Times article treats Iranian collapse as the natural conclusion of sufficient pressure. History offers no such certainty. The earlier maximum pressure campaign caused severe suffering without producing submission. The nuclear dispute intensified. Iran’s oil trade shifted towards China. Sanctions strengthened the clandestine and state connected networks best equipped to evade them.
The new offensive begins with Iran economically weaker but with the Gulf already destabilised, China openly resisting extraterritorial sanctions and Russia having no reason to assist Washington. It may impoverish Iran further while accelerating the very alternative networks it is supposed to eliminate.
America can punish Iran. Bessent has not shown that it can seal a country of Iran’s size and geography, compel China and Russia to cooperate, protect Gulf commerce and determine how Tehran responds.
His “economic D Day” may crush a great deal. It may not deliver victory.