Move comes amid concerns that Trump delegation could help Bolsonaro family cast doubt on electronic voting ahead of October’s presidential election SÃO PAULO—Brazil has denied visas to two senior Trump administration officials who were planning to travel to the country, amid concerns that they sought to undermine confidence in the electronic-voting system before October’s presidential election. The move comes as fears deepen in Brazil that the Bolsonaro family is working with President Trump and his allies to unseat leftist President Luiz Inácio Lula da Silva and help return the Brazilian right to power. Former president Jair Bolsonaro is serving a...