A new poll has reaffirmed the tight race for Brazil’s presidency this year, with both the left-wing incumbent Luiz Inacio Lula da Silva and his right-wing challenger, Flavio Bolsonaro, tied in a head-to-head contest.On Saturday, Datafolha, the polling firm for the Grupo Folha media conglomerate, released its latest numbers, tracking the candidates’ progress in the run-up to October’s generation election.Nearly 2,004 responded to the latest survey, which asked them to identify whom they would vote for if Lula and Bolsonaro progressed to a run-off.Lula, now 80 years old, is angling for a fourth nonconsecutive term.Brazil’s presidents are limited to two…

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