His leftist rival Fernando Haddad, standing in for the jailed PT founder and former president Luiz Inacio Lula da Silva, has been trailing Bolsonaro since the first round vote three weeks ago.
But final opinion polls on Saturday showing Haddad gaining momentum and endorsements from leading legal figures in Brazil’s unprecedented fight against political corruption have raised hopes among his supporters that he can pull off what would be a stunning upset win.
Haddad has reduced Bolsonaro’s lead from 12 to 8 percentage points in five days, according to the Ibope polling firm that gave him 46 percent of voter support compared with Bolsonaro’s 54 percent. A Datafolha poll also released late Saturday showed Bolsonaro had 55 percent and Haddad 45 percent.
Haddad failed to win the crucial endorsement of center-left former candidate Ciro Gomes, a former governor of Ceará state in the northeast, which would have given Haddad a big lift in Brazil’s poorest region.