Lula maintains a consistent lead in first-round polling aggregates as the incumbent Workers’ Party candidate seeking a fourth term, supported by established voter bases and recent official campaign advertising that began in late August. Flávio Bolsonaro, the Liberal Party nominee and main right-wing challenger, trails significantly in surveys while contending with limited coalition support, internal party frictions, and legal scrutiny tied to prior events. Fragmented opposition candidacies—including Ronaldo Caiado, Romeu Zema, Renan Santos, and Augusto Cury—register low single-digit or lower shares, diluting any path to plurality. TSE approval of multiple candidacies in early September formalized the field without altering frontrunner positioning. These dynamics underpin trader consensus that Lula holds the highest implied probability of topping the October 4 ballot, with a runoff the more probable outcome overall.