Brazilians are voting Sunday in a presidential runoff that pits leftist incumbent Luiz Inácio Lula da Silva against Sen. Flávio Bolsonaro, a far-right ally of U.S. President Donald Trump. Bolsonaro, the son of imprisoned former President Jair Bolsonaro, bested Lula by more than 2.2 million votes in the first round of the election earlier this...