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

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,

President Trump wants America to produce more of the much-needed mineral, but a 50 percent tariff could undermine his aim of a manufacturing renaissance.