As eight Brazilian senators settled into their seats on a flight to Washington on a dry winter evening last month, a single question overshadowed the deep political differences that separated some of them: could they stop the Americans from imposing a tariff that threatened to gut their country’s vital export revenues?
They had begun to feel a sense of urgency weeks earlier, forcing them to put aside a stand-off between President Luiz Inácio Lula da Silva and former president Jair Bolsonaro that…
