President Trump said on Tuesday that he intended to impose a 10 percent tariff on Chinese imports into the United States on Feb. 1, a decision that is sure to escalate trade tensions between the world’s largest economies.

U.S. President Donald Trumpon Tuesday vowed to hit the European Union with tariffs and said his administration was discussing a 10% punitive duty on Chinese imports because fentanyl is being sent from China to the U.

Trump underscored his intention to use tariffs as a tool of international economic policy and an increasingly vital source of government revenue.