US President Donald Trump announced that any country doing business with Iran would face a 25 percent tariff on trade with the US. This announcement comes as the US deliberates about a potential response to violent protests in Iran. No detailed policy or official documentation has been released by the White House. Iran’s main trading partners, including China, the United Arab Emirates, Turkey, and India, could feel increased pressure from the tariffs. China criticized President Trump’s statement and pledged to take “all necessary measures” to protect its interests.