Brazil’s right-wing presidential candidate Flavio Bolsonaro was riding high in the polls until the news broke of his ties to a banker jailed over a multimillion-dollar fraud scandal. The 45-year-old senator had been polling neck-and-neck with 80-year-old President Luiz Inacio Lula da Silva, who is expected to seek a fourth term in presidential elections in October. But a change may be under way following the publication of an audio recording by investigative outlet The Intercept in which...