Brazil’s former leftwing president Luiz Inácio Lula da Silva is on the brink of an astonishing political comeback, with polls suggesting he is poised to defeat his far-right rival Jair Bolsonaro in Sunday’s election.

While there are nearly a dozen candidates on the ballot, the race has been dominated by two frontrunners and polar opposites: right-wing incumbent President Jair Bolsonaro and leftist former president Luiz Inacio Lula da Silva, leader of the Workers’ Party.

Both have been seen on the campaign trail flanked by security and police, even wearing bulletproof vests at times. Bolsonaro wore his as he kicked off his re-election bid last month in the city of Juiz de Fora, where he was stabbed in the stomach during his 2018 presidential campaign. Da Silva, who is commonly referred to as Lula, was seen also wearing a vest during an event in Rio de Janeiro, the same city where a homemade stink bomb was launched into a large crowd of his supporters back in July.

After voting alongside his wife Rosangela da Silva at a Sao Paulo school on Sunday, Lula told reporters: “We don’t want more discord, we want a country that lives in peace. This is the most important election. I am really happy.”

He also referenced the 2018 elections, where he had been unable to run – or vote – because of a corruption conviction, which was overturned last year.

“Four years ago I couldn’t vote because I had been the victim of a lie in this country. And four years later, I’m here, voting with the recognition of my total freedom and with the possibility of being president of the republic of this country again, to try to make this country return to normality,” Lula said.