Trump threatens 'crushing economic operation' against Iran allies

The sixty-day ceasefire between the United States and Iran expired on Monday with nothing to show for it—no diplomatic breakthrough, no military pause, no path forward. By Wednesday evening, President Trump had moved to fill that vacuum with what he called an "economic D-Day," a sweeping threat of punishment against any nation willing to do business with Tehran or prop up its financial system.

In a post on Truth Social written partly in capital letters, Trump announced he was launching "the most crushing economic operation ever taken against any country." He did not name Iran's allies directly, nor did he spell out what consequences those countries might face. But the message was unmistakable: financial institutions, airports, government agencies, businesses—any entity that served as a lifeline to Iran would itself become a target. He listed the mechanisms he wanted stopped: oil smuggling, currency swaps, cash transfers, exchange houses, ship registries, front companies. "It all needs to stop NOW," he wrote. "You know who you are."

The threat came a day after the United Arab Emirates, a longtime American partner in the region, announced it was severing all financial and economic ties with Iran. The UAE's decision followed a new missile threat from Tehran—two ballistic missiles launched toward maritime traffic in the Gulf, both of which fell into the sea. For years, Dubai's financial system had served as a crucial conduit for Iranian money moving through exchange houses and shell companies. Now that door was closing. In response, Iran's armed forces warned its Gulf neighbors that any support given to American military operations would be treated as collusion.

The economic pressure campaign itself was not new. In April, the Trump administration had announced Operation Economic Fury, designed to strangle Iran's revenue streams through sanctions and by cutting off foreign companies from doing business with Tehran. A naval blockade was meant to stop Iranian exports entirely. Now, with the ceasefire dead and diplomacy stalled, Trump was escalating the rhetoric and the scope. Treasury Secretary Scott Bessent had said just days earlier that the US would soon impose economic isolation on Iran "like the world has never seen before."

China loomed large in this calculation, though Trump did not name it. Chinese refineries, mostly in Shandong province in the east, are the world's largest buyers of Iranian oil—a critical source of revenue for Tehran. Since the war began in late February, Washington had already sanctioned several of these so-called teapot refineries, privately owned processing plants that handle much of the crude. China's Ministry of Commerce had responded by declaring those sanctions invalid under international law and ordering Chinese entities not to recognize or comply with them. The BBC sought comment from the Chinese embassy in Washington but had not yet received a response.

The conflict had already reshaped global energy markets. The Strait of Hormuz, through which roughly one-fifth of the world's crude oil and liquified natural gas normally flows, had seen significant disruption. Shipping traffic had been disrupted, pushing energy prices higher worldwide. For American consumers, the impact was already visible at the pump and in heating bills. With midterm elections coming in November, Trump faced mounting pressure over the war's economic cost to ordinary Americans. His hardline approach—threatening even American allies like Oman if they got in the way of his own separate negotiations with Iran—suggested he was betting that economic pain at home could be offset by projecting strength abroad. Whether that calculation would hold remained to be seen.