Trump's tariff post targeting Iran comes as the oil-rich country struggles to suppress an ongoing swell of massive anti-government protests.

President Donald Trump on Monday said any country doing business with Iran will face a 25% tariff “on any and all business being done with the United States of America.”

That new tariff on imports from Iran’s trading partners is “effective immediately,” Trump said in a Truth Social post.

“This Order is final and conclusive. Thank you for your attention to this matter!” he wrote.