The president was following through on an earlier statement that he would target a key metal used for semiconductors, lithium-ion batteries and more.

President Donald Trump announced a 50% tariff on copper products sold in the United States effective Aug. 1. Trump said he made the decision after he received a national security assessment, according to a social media post.

President Donald Trump announced that the United States will impose a 50% tariff on all copper imports starting August 1. The decision threatens to disrupt a global supply chain for one of the key inputs for the American industry and a crucial commodity for the green technology transition.