Luiz Inácio Lula da Silva, the leftist incumbent, and Flávio Bolsonaro, the right-wing challenger, face off in a narrow race that could redefine the future of Latin America.

© Adriano Machado/Reuters

Flávio Bolsonaro, the son of the former president who was jailed over a coup plot, could be on the cusp of winning Brazil’s presidency.

© Silvio Avila/Agence France-Presse — Getty Images

Brazil’s President Luiz Inácio Lula da Silva, a leftist, staged a remarkable comeback on Sunday, winning re-election and stopping a right-wing wave.

© Victor Moriyama for The New York Times

Deep in cattle country, voter sentiments in an evangelical stronghold help explain why the country’s leftist president is the underdog in Sunday’s election.

© Seth Kugel for The New York Times