The US president also says that any country that trades with Iran “will face tremendous economic consequences.” Published August 19, 2026 US President Donald Trump has again threatened Iran with unprecedented economic action, accusing Tehran of failing to seize the opportunity to reach a deal while talks aimed at ending the more than five-month conflict between the two countries remain stalled. In a post on Truth Social on Wednesday, Trump announced what he called the “most devastating economic operation ever undertaken against any country” against Iran, using his signature all-caps style. List of 4-item Recommended Storiesend list He said Iran had “failed to seize” the opportunity to reach a deal and would face “economic war and isolation on an unprecedented scale.” Trump also threatened sanctions against any country that does business with Iran. smuggling, swap lines, cash transfers, exchange houses, ship searches, front companies – it all needs to stop NOW. You know who you are. “This will be an ECONOMIC DAY, and we need all of our allies to support the United States of America to isolate and defeat the threat from Iran,” he wrote. This is not the first time Trump has threatened Iran with economic sanctions. His administration has waged a pressure campaign against Iran since April under the banner of Operation Economic Fury, designed to isolate Tehran and block its revenue streams. The United States has already imposed sweeping sanctions on Iran’s oil, maritime and financial sectors, seeking to cut off revenues. He also imposed a naval blockade on Iranian ports and targeted companies, brokers and tankers accused of helping Iran sell its oil abroad. Al Jazeera’s Mike Hanna, reporting from Washington, D.C., said Trump’s latest post showed “some degree of frustration.” “Is this, for the Iranians, another shouted threat? Well, on the surface, that is the case. But perhaps its target audience is an American public that continues to oppose this ongoing conflict. “He is now taking what he hopes will be seen in the public forum as a very strong stance, regardless of the fact that we do not have specific details on which to judge the possible effectiveness of this particular measure in strengthening economic action against Iran,” Hanna said.
