Copper is used in a wide variety of products from electronics, wiring, machinery and cars. The U.S. produces a majority of the copper it uses but still imports large quantities, primarily from

The president was following through on an earlier statement that he would target a key metal used for semiconductors, lithium-ion batteries and more.

US trading partners braced for a volley of tariff hikes this week, but a deadline for their imposition came and went as President Donald Trump delayed them again until August -- but unveiled new coppe