Scott Bessent Promises the Toughest Sanctions in History as Washington Widens Operation Economic Fury Against Iran

Verified key facts

• Treasury Secretary Scott Bessent said in a CNBC interview on Thursday that the United States will impose what he called the toughest sanctions in history on Iran, as reported by the Associated Press
• Bessent warned third countries and companies that if they insist on doing business with Iran the US Treasury will put its full might and force against them, per the Associated Press
• President Donald Trump has promised what he described as economic warfare and isolation on an unprecedented scale, and officials have briefed the next phase as an economic D-Day, the Associated Press reported
• The campaign is being run under the name Operation Economic Fury, whose earlier phase targeted buyers of Iranian oil and banks handling Iranian money, according to the Associated Press
• Iran's foreign ministry spokesman Esmail Baghaei publicly played down the threat, the Associated Press reported, noting Tehran has lived under US sanctions for decades
• Richard Goldberg of the Foundation for Defense of Democracies told the Associated Press that we are in uncharted waters, while Ali Vaez of the International Crisis Group said pressure without an open door is an exercise in futility
• CNN reported that the Treasury imposed a fresh round of sanctions on Hezbollah on 20 August, a day before Bessent set out the wider Iran package
• Democracy Now reported that the White House will not seek to extend the memorandum of understanding with Iran, and that the 60-day ceasefire arrangement lapsed without a deal to end the war

Bessent Sets Out the Next Phase

The United States will impose what Treasury Secretary Scott Bessent called the toughest sanctions in history on Iran, he told CNBC on Thursday, in an interview the Associated Press reported as the clearest statement yet of where Washington intends to take a war that is approaching its sixth month.

Bessent framed the measures not as a squeeze on particular sectors but as an attempt to break the Iranian state's finances outright, saying the package was designed to collapse the government in Tehran. That is an unusually explicit statement of intent from a Treasury secretary, and it moves the declared goal of the campaign well beyond the nuclear file that dominated the previous decade of sanctions policy.

The announcement follows President Donald Trump's pledge, quoted by the Associated Press, to wage economic warfare and isolation on an unprecedented scale. Officials have been briefing the next phase to reporters as an economic D-Day, language that signals a single large tranche of designations rather than the steady drip of individual listings that has characterised much of the year.

What Operation Economic Fury Has Already Done

The campaign has a name inside the administration, Operation Economic Fury, and it has been running for months. Its first phase, according to the Associated Press, concentrated on the entities and individuals directly buying Iranian crude and on the banks that moved the proceeds, a familiar architecture built on the oil-for-payment chains that route through intermediaries in the Gulf and East Asia.

That approach has a long track record and a well understood ceiling. Iran has spent two decades building workarounds: ship-to-ship transfers, tankers with disabled transponders, layered ownership through shell companies, and barter that never touches the dollar system. Each designation closes a route; each closure prompts a new one.

The Treasury also announced a fresh set of Hezbollah designations on 20 August, CNN reported, a day before Bessent outlined the wider Iran package. Targeting the Lebanese group's financial network alongside Tehran's own is consistent with the administration's argument that Iranian revenue and Iranian proxies cannot be separated for sanctions purposes.

Secondary Sanctions and the Threat to Third Countries

What is genuinely new is the threat aimed at everyone else. Bessent told CNBC that if a company or a country insists on doing business with Iran, the US Treasury and the US government will put its full might and force against you, according to the Associated Press. He declined to name which entities would be designated.

Secondary sanctions of that kind do not punish Iran directly. They punish the buyer, the shipper, the insurer or the bank in a third country, by threatening its access to the American financial system. The mechanism is powerful precisely because it does not require the cooperation of any foreign government, and it is contentious for the same reason.

The practical question is how far Washington is prepared to go against large economies rather than small intermediaries. Designating a refinery in a country the United States needs for other reasons carries a diplomatic cost that designating a shell company registered in a free zone does not.

A Ceasefire That Expired Without a Deal

The economic escalation is happening because the diplomatic track has stalled. Democracy Now reported that the White House will not seek to extend its memorandum of understanding with Iran, and that the 60-day ceasefire arrangement lapsed without an agreement to end the fighting.

Trump has publicly called on Tehran to surrender, language that leaves very little room for the kind of face-saving formula that usually accompanies a negotiated pause. The Associated Press noted that the administration is turning to financial pressure at a moment when stockpiles of some key munitions are running down, which gives the sanctions push a logic beyond simple coercion.

The NE Times reported on 19 August that Trump had already ruled out extending the ceasefire while Tehran signalled a fully offensive posture. Thursday's announcement puts a specific instrument behind that position.

Tehran's Answer: Sanctions Are Not New

Iran's response was studiedly unimpressed. Foreign ministry spokesman Esmail Baghaei played down the threat, the Associated Press reported, and the argument he made is one Iranian officials have made for years: the country has been under American sanctions in one form or another since 1979, and under the most intensive versions of them since 2018.

That is not merely rhetoric. Iran's economy has restructured itself around restriction, with a large informal foreign exchange market, extensive state subsidy of essential goods, and export routes that assume interdiction as a normal operating cost. The population pays for that adaptation through inflation and a weak currency, but the state itself has proved durable.

The gap between the two positions is stark. Washington is describing an instrument capable of collapsing a government. Tehran is describing a condition it has lived in for most of its existence as a republic.

Why Analysts Doubt Collapse Is a Realistic Goal

Analysts quoted by the Associated Press were sceptical that the stated aim is achievable. Richard Goldberg of the Foundation for Defense of Democracies, an organisation that has consistently argued for maximum pressure, said simply that we are in uncharted waters, an acknowledgement that nothing on this scale has been attempted against a country of Iran's size.

Ali Vaez, the International Crisis Group's Iran director, put the objection more sharply, telling the Associated Press that pressure without an open door is an exercise in futility. The point is procedural rather than moral: sanctions historically produce concessions when they are paired with a defined path to relief, and the expiry of the memorandum of understanding removes exactly that.

Behnam Ben Taleblu, who directs the Iran programme at the Foundation for Defense of Democracies, was also cited in the Associated Press account of the debate now running in Washington over whether financial pressure can substitute for the military options the administration has been weighing.

The Treasury Designations Expected in the Coming Days

The test of Thursday's announcement is the designation list itself, which the Treasury has not yet published. Three things in it will matter more than the count: whether a large refiner or state-linked buyer outside Iran appears, whether shipping insurers are named alongside vessel owners, and whether wind-down periods give third parties a legal off-ramp.

A list dominated by shell companies and small traders would suggest continuity with Operation Economic Fury's first phase under a louder name. A list that reaches into the balance sheets of significant foreign firms would mark the genuine break Bessent described, and would put allied governments in the position of deciding whether to shield their own companies.

Iran's answer will be read in the same way. Baghaei's dismissal is the official line; the operational response, if there is one, will show up in the shipping data and in whether Tehran resumes contact through the intermediaries that carried the ceasefire talks.

Sources

• Associated Press - Trump warns of 'economic D-Day' against Iran, but Tehran is well acquainted with sanctions
• CNN - US imposes new sanctions on Hezbollah, threatens economic pressure on Iran
• Democracy Now! - Headlines for August 21, 2026
• The Washington Post - Trump warns of 'economic D-Day' against Iran, but Tehran is well acquainted with sanctions