Trump twinned his threat to Brazil with the promise of a 50% tariff on copper, which would strike at the economic lifeline of two more Southern neighbors, Chile and Peru. The president capped his week by setting a 30% tariff on Mexican imports as of Aug. 1.

Aircraft, machinery, cars, chemicals and medical devices are the leading big-ticket items on the latest list of U.S. goods the European Commission has proposed to impose tariffs on if talks with Washi...

Indonesia is one of the top global producers of copper, which Trump warned earlier this month could be hit with a 50 percent tariff as a way to increase production of it in the U.S.