U.S. copper prices are trading at records ahead of the 50% tariff that the president has promised to impose on imports.

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