The United States has widened its economic campaign against Iran, and China is pushing back. Beijing said it will protect its own interests after Washington threatened to isolate any nation that keeps doing business with Tehran.
US Treasury Secretary Scott Bessent called the effort the greatest financial offensive ever mounted against Iran. He said the US will sever all economic ties with the country. He also warned that any nation partnering with Iran financially will face isolation too.
A shift from war to economic pressure
Iran's president said Friday that the world had approved the country's victory in the recent conflict. US Vice President JD Vance called economic pressure the most effective tool that we have.
The United States has now raised the possibility of an indefinite blockade of Iran. The standoff centers on the Strait of Hormuz, a narrow waterway that carries a large share of the world's oil. Vessels in the strait were visible near the beach of Bandar Abbas, Iran, on August 25, 2026.
Iran's foreign minister called the threat of new US economic sanctions desperate. He insisted that Tehran will not bow to pressure.
China's warning
China buys much of the oil that Iran sells. The US threat to isolate nations that do business with Tehran therefore lands directly on Beijing.
China will protect its legitimate interests, the foreign ministry said in a statement. The wording was brief, but the message was clear: Beijing will not simply follow Washington's lead.
It remains unclear whether the US will apply the measures to China directly. Such a step could deepen friction between the world's two largest economies and ripple through global supply chains.
What happens next
Diplomats are watching two questions closely. First, will China keep buying Iranian oil? Second, will other buyers such as India and Turkey comply with the US push?
Analysts say the campaign is a test of how far economic statecraft can go when military options have been set aside. For now, Tehran says it has won the war. Washington says the financial fight is just beginning.