The Trump administration unveiled tariff investigations on Wednesday that could result in higher levies on scores of nations.

The United States has launched two new Section 301 of the Trade Act of 1974 investigations targeting global trade practices, raising the possibility of sweeping tariffs.

US Trade Representative Jamieson Greer said on Wednesday that the investigation under Section 301 of the Trade Act of 1974 could lead to new tariffs by the summer on a group of economies that Washingt...