The sector-specific tariffs are putting pressure on businesses and foreign nations as they try to navigate Trump's constantly evolving trade agenda.

U.S. President Donald Trump on Tuesday said he would impose a 50% tariff on imported copper and soon introduce long-threatened levies on semiconductors and pharmaceuticals, broadening his trade war that has rattled markets worldwide.

President Donald Trump said he will impose a 50% tariff on copper imports and suggested more steep sector-specific duties are on the way.