Brazil election: Can Flavio Bolsonaro challenge Lula in a neck-and-neck race? What latest polls show. Brazil's presidential election is entering its final stretch, with President Luiz Inacio Lula da Silva and Flavio Bolsonaro in a close first-round race. An AtlasIntel poll gives 45% and Bolsonaro 42%. Voting is set for 4 October, with a runoff on 25 October if required.