The planned 50% tariff on copper imports may turn out to be the biggest own goal of U.S. President Donald Trump's ongoing trade war with the rest of the world.

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

President Trump said Tuesday that an ongoing investigation of tariffs on copper will end with 50% duties on the metal, and he threatened 200% tariffs on pharmaceuticals.

By Ana Isabel Martinez and Daina Beth SolomonMEXICO CITY/SANTIAGO (Reuters) -President Claudia Sheinbaum said on Wednesday Mexico could redirect the copper it typically sends to the U.S. to avoid tariffs from the Trump administration,

President Donald Trump told reporters during a cabinet meeting Tuesday that more trade deals are on the way, especially in the form of letters setting rates unilaterally by the U.S. “The deals are mostly my deal to them,

Trump and his aides have repeatedly shifted their stance on tariffs in the weeks since the president’s “Liberation Day” announcement.

Chile, the world's No. 1 copper producer, is in wait-and-see mode after U.S. President Donald Trump announced a surprise 50% tariff on imports of the red metal, with the Andean nation blindsided while its top miner held out hope of exemptions.