Donald Trump ratcheted up pressure on Brazil to drop criminal charges against former President Jair Bolsonaro, saying he would be “watching closely” for a response just a week after threatening to impose punishing tariffs on the South American nation.

Trump cast his announcement as a pressure tactic to help Bolsonaro, who is on trial for allegedly plotting a coup to overturn his loss in the 2022 presidential election.

Trump twinned his threat to Brazil with the promise of a 50% tariff on copper, which would strike at the economic lifeline of two more Southern neighbors, Chile and Peru. The president capped his week by setting a 30% tariff on Mexican imports as of Aug. 1.