United States President Donald Trump has announced plans to impose a 25 percent tariff on any country that trades with Iran, intensifying pressure on the Iranian government as the country faces its largest protests in decades.

Years of Western sanctions have battered Iran’s economy, causing high inflation, rising unemployment, and the collapse of its currency, the rial. The current protests are driven largely by these economic struggles, which the government has struggled to address amid its international isolation.

Iran’s main trading partners include China, Turkey, Iraq, the United Arab Emirates, and India, with China accounting for about 80 percent of its oil imports. Trump’s new tariff threat raises concerns over how these countries will respond.

“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,” Trump wrote on his Truth Social platform on Monday. “This Order is final and conclusive.”

The announcement came without any formal documentation from the White House, and no legal authority for the tariffs was specified.

Trump has previously increased pressure on Iran through economic sanctions and threats of military action, signaling a hardline approach to influence Tehran’s political and economic decisions.