US President Donald Trump announced a 25% tariff on any country trading with Iran. On Monday, he wrote on Truth Social: "Effective immediately, any country doing business with the Islamic Republic of Iran will pay a tariff of 25% on any and all business being done with the United States of America. This order is final and conclusive." Trump gave no details on how this would be enforced or which countries would be targeted. China is Iran’s biggest export partner, buying over $14 billion worth of goods last year. Iraq, the United Arab Emirates, and Turkey also trade heavily with Iran. Most of Iran’s exports are fuel-related, as it is a top oil producer. Iran imports mainly food staples and gold. The 25% tariff could add to existing US trade levies, but the White House hasn’t clarified. Enforcing this tariff may be tough since Iran uses shadow ships and sells oil in Chinese yuan, avoiding US dollars. Analysts say the tariff could aggravate the US-China trade fight. China already faces a 30.8% average tariff in the US and warned it will protect its interests. Iran’s economy is struggling due to sanctions, inflation at 48.4%, low employment, and high living costs. The new tariff may deepen its financial woes as protests over the economic crisis continue.