Arguing that America is harmed by other countries’ trade practices, President Donald Trump said on March 1 that the U.S. will impose a new 25 percent tariff on imported steel and 10 percent tariff on imported aluminum. “People have no idea how badly our country has been treated by other countries,” Trump said. Although China is the world’s largest producer and exporter of steel, it is only the 11th largest exporter of steel to the U.S., and the fourth largest exporter of aluminum to the U.S.