Trump Declares Economic War on Iran, Threatening Allies Who Refuse to Cut Ties

A Financial Ultimatum Heard Around the World

The Trump administration escalated its economic offensive against Iran on Monday, August 24, launching what Treasury Secretary Scott Bessent called "Operation Economic Outcast" — a sweeping expansion of secondary sanctions designed to sever Tehran from the global financial system. The message to the rest of the world was blunt: choose sides.

"Every country, every entity should know that they should be prepared to face U.S. sanctions," Bessent declared. "And no one is above this — we are going to hold everyone accountable. And this is the economic asphyxiation of this regime." It was the kind of language that signals a turning point, not just a policy update.

The Trump administration broadened its sanctions campaign against Iran and threatened foreign governments and companies with new penalties if they continue doing business with Tehran, as the U.S. seeks to cut off the country from the global economy after months of war. The administration said it has expanded the categories of "Iran-related conduct" that the U.S. might sanction in the future, and that it plans to give nations specific defined timelines to end their relationships with the regime.

What's Actually Being Targeted

Treasury Secretary Bessent announced sanctions that target digital assets, technology, gold, aviation, and shipping. The administration also sanctioned more than 60 entities, individuals, and vessels it says helped Iran generate oil revenue, obtain nuclear and missile technology, and conduct cyber operations. The breadth of the new designations signals that Washington is trying to close every remaining gap in Iran's economic lifelines.

The Treasury in recent months has sanctioned independent Chinese "teapot" refineries for purchases of Iranian oil and expanded its targeting of the shadow fleet of tankers transporting Iranian oil. A much more powerful tool is the authority to sanction banks in China and other countries that are facilitating transactions with Iran, a step that the Trump administration has so far been unwilling to take amid a delicate trade truce with Beijing.

The plan quickly drew questions about whether the U.S. would also go after China, Iran's top trading partner. Treasury Secretary Scott Bessent suggested that China would not be exempt. China buys at least 90% of Iran's crude oil exports, and Russia, although a smaller economic partner than Beijing, provided about $5.8 billion in trade in 2025. Targeting those flows without fracturing the fragile U.S.-China trade relationship will be a delicate balancing act.

Iran's Economy Is Already Crumbling

Iran's currency hit a record low on Monday as Washington announced new sanctions, adding further pressure on an economy already battered by previous sanctions and a U.S. naval blockade. The rial dropped to 2.02 million to the U.S. dollar as trading opened on currency markets. Iran's official Central Bank rate stood at around 1.5 million rial to the dollar, but the market rate is what most Iranians pay. That gap between the official and street rates tells its own story about how ordinary Iranians are experiencing this crisis.

The currency had already been under pressure before the U.S. and Israel attacked Iran on February 28, as Iran faced double-digit inflation and negative growth, but has repeatedly hit new lows as nearly six months of war have taken an even greater toll. Already last week, the United Arab Emirates announced that it was suspending all trade with Iran. The UAE has long been one of Iran's largest trading partners and its biggest source of imports.

Will the Pressure Actually Work?

While Bessent has been conducting a PR buildup for the last 10 days over an "economic D-Day" against Iran, the reality is more complicated. The U.S. already has significant secondary sanctions targeting countries that trade with Iran, particularly its oil sector — but the U.S., including the current administration, has only partially enforced them.

For the new economic pressure campaign to be effective, the U.S. will need to mobilize its Western allies to form a coalition to enforce the measures against Iran. The Trump administration will also have to aggressively confront countries like China, Russia, India, Pakistan, Qatar, Turkey, and others that still trade with Iran, something it hasn't done so far.

The plan is aimed at ratcheting up pressure on the Iranian regime amid the current "no war, no deal" limbo. U.S. officials say the expanded secondary sanctions are expected to be the main course of action against Iran until at least after the midterm elections, when a new military campaign could again be on the table. For now, the battlefield has shifted from the Strait of Hormuz to the global banking system — and the world's major economies are being forced to pick a lane.