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.

Brazil’s chief prosecutor has called for a guilty verdict in the case of far-right former President Jair Bolsonaro, who is on trial accused of leading an alleged coup plot.

“The evidence is clear: the defendant acted systematically, throughout his mandate and after his defeat at the polls, to incite insurrection and the destabilization of the democratic rule of law,” Pr...