The planned 50% tariff on copper imports may turn out to be the biggest own goal of U.S. President Donald Trump's ongoing trade war with the rest of the world.

President Donald Trump announced on Wednesday night that the United States will impose a 50 percent tariff on copper, effective August 1. Trump wrote on Truth Social that he came to the decision after a "robust NATIONAL SECURITY ASSESSMENT."

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

U.S. President Donald Trump's threat of a 50% tariff on copper imports is raising alarm in the U.S. auto sector, as it could make it even harder for carmakers and suppliers to absorb border taxes and rising costs,

Trump announced a 50% tariff on copper imports Tuesday, triggering a jump in U.S. copper prices that could cause an increase in metal theft.

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,

President Donald Trump has announced a 50% tariff on all copper imports, a move that could shake industries across the country. This means that companies bringing copper into the U.S. from other countries will have to pay half the value of that as a fee.

The Trump administration's tariff strategy is reshaping global trade dynamics, with aluminum, copper, and steel at the forefront. As tariffs become a central tool in U.S. foreign and trade policy, these key metals face increased scrutiny,

President Donald Trump said on social media that he would impose a 30% tariff on the European Union and Mexico on August 1. NBC News' Yamiche Alcindor reports on how Trump would respond if either the E.