Incumbent president lost in first round to senator and son of convicted ex-president Brazilians are going to the polls on Sunday in a highly unpredictable runoff in which the leftist president, Luiz Inácio Lula da Silva, is attempting an unprecedented comeback against the far-right senator Flávio Bolsonaro, who won the first-round vote.Bolsonaro’s surprise victory despite not leading most polls made him the favourite three weeks ago, but since then Lula’s campaign has gained ground, and the two
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