Overview
- Trump announced on Truth Social that, effective immediately, any country doing business with Iran will face a 25% tariff on all transactions with the United States.
- The statement did not clarify whether the tariff applies to existing trade relationships or only future deals, creating significant implementation uncertainty.
- Reporting notes that key Iranian partners such as China, India and Turkey could be hit, raising the prospect of broad disruptions to U.S. trade ties.
- Brazil faces notable exposure, having exported $2.9 billion to Iran and imported $84.5 million in 2025, largely in agricultural products and urea for fertilizers.
- A pending U.S. Supreme Court decision on tariff authority could constrain the measure, as separate reporting describes internal debate over military versus diplomatic options during continuing protests in Iran.