The United States has opened investigations under Section 301 of the Trade Act of 1974 into 16 key trading partners, aiming to counter what Washington calls unfair trade practices.
This allows the US Trade Representative to impose tariffs or other retaliatory measures. The administration says all but one of the countries run substantial goods trade surpluses with the US, potentially disadvantaging American producers.
If you want to know the countries involved, here's the list:
European Union
China
Mexico
Vietnam
Taiwan
Thailand
Japan
India
South Korea
Switzerland
Malaysia
Indonesia
Cambodia
Bangladesh
Norway
Singapore