The exchange with the South American nation suggests the U.S. president also sees trade as a tool to influence other policies of foreign countries.

U.S. President Donald Trump launched his global tariff assault into overdrive on Wednesday, announcing a new 50% tariff on U.S. copper imports and a 50% duty on goods from Brazil, both to start on August 1.

Donald Trump's 50% tariff on Brazilian imports has ignited a diplomatic clash with President Lula, who decried “tutelage” and vowed retaliation. Trump