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. 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,

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