President Trump Announces 25% Tariff on Chinese Goods The U.S. trade war with China heats up with the announcement on Friday, which has already sent the Dow down 200 points. The White House said the tariffs will be applied to roughly 1,100 exports. Affected industries include aerospace, auto, robotics and manufacturing. Trump said the tariffs will go into effect on July 6. The announcement comes months after the U.S. first imposed the tariffs on China for stealing American intellectual property and technology secrets.