President Trump wants America to produce more of the much-needed mineral, but a 50 percent tariff could undermine his aim of a manufacturing renaissance.

Copper shipments into the United States are expected to accelerate in the coming weeks in a final scramble to get metal across the border before U.S. President Donald Trump's higher than expected 50% tariff on imported copper takes effect.

US copper purchasers are preparing for significantly higher expenses if a 50% duty on processed copper is imposed from August 1, industry producers and analysts say. With Washington on the verge of applying these duties,