President Donald Trump announced that the US will impose a 25% tariff on any country that continues doing business with Iran, though details on how the policy will be enforced remain unclear.
In a post on Truth Social, Trump said the tariff would apply immediately to all trade between the US and any nation working with the Iranian government. The White House has not yet explained which countries could be affected or how the measure would be implemented.
The move comes as Iran faces widespread protests against its leadership, with human rights groups reporting hundreds of deaths and thousands of arrests during the government crackdown.
Trump has publicly voiced support for protesters and suggested the US could play a role in helping them.
The announcement also arrives as the Supreme Court prepares to rule on the legality of tariffs imposed under emergency economic powers, a decision that could have major financial consequences for the US government and businesses.