The world’s biggest maker of copper cable is applauding President Donald Trump’s planned 50% tariff on the metal, saying it will bolster the American supply chain, with costs passed on to customers.

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,