Trump warns of imposing a 25% tariff on countries that trade with Iran.

President Trump announced a 25% tariff on imports from countries "doing business" with Iran, effective immediately, although official documentation and definitions of "doing business" have not been released. This measure comes amidst widespread protests in Iran, and Trump has hinted at possible military action as well. The tariffs resemble those he previously threatened against Venezuela and would be enacted under the International Emergency Economic Powers Act, which is currently under Supreme Court scrutiny. Trump has criticized potential tariff refunds, claiming they would be complex and difficult to manage.