Right-wing incumbent Jair Bolsonaro and left-wing former president Luiz Inácio Lula da Silva will face off in the runoff for Brazilian president as voters head to the polls on Sunday. Lula won the first round on October 2, but by a much smaller margin than expected by pollsters. Sunday’s race is considered open. The mood in Latin America’s largest country with more than 210 million inhabitants is very heated after an extremely hard-fought election campaign. Bolsonaro has repeatedly cast doubt on the electoral system and hinted that he might not recognize the result if he loses. Some of his sup…