Brazil's former President Luiz Inacio Lula da Silva, who is running for re-election, campaigns a day ahead of the country's general elections, in Sao Paulo, October 1, 2022.

Brazil election: Lula and Bolsonaro supporters rally in Sao Paulo on eve of vote

Rival supporters gathered in Sao Paulo ahead of Sunday's election, with opinion polls suggesting ex-president Luiz Inácio Lula da Silva leads the right-wing incumbent, Jair Bolsonaro.