Whether his copper tariff will remain in place is a question given the number of times Trump has flip-flopped on tariffs of various kinds.

Prices of copper in the US have surged since January, when President Donald Trump threatened to impose a tariff on imports of the metal that’s a vital component in power networks, plumbing and industrial machinery.

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,