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,

Trump announced a 50% tariff on copper imports Tuesday, triggering a jump in U.S. copper prices that could cause an increase in metal theft.

US President Donald Trump’s promised 50% copper tariffs are set to include all refined metal, indicating the president’s far-reaching efforts to bolster American production of one of the world’s most ubiquitous materials.