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,

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

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."