President Trump wants America to produce more of the much-needed mineral, but a 50 percent tariff could undermine his aim of a manufacturing renaissance.

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

President Donald Trump mentioned Tuesday — almost in passing — that he planned to impose a 50% tariff on copper imports. It still hit like a bombshell, with potential to shake up U.S. efforts to expand,