Incumbent President Luiz Inácio Lula da Silva, seeking a fourth term under the Workers' Party, and Senator Flávio Bolsonaro of the Liberal Party lead first-round polling for Brazil's October 4 presidential election by wide margins over other contenders such as Ronaldo Caiado and Romeu Zema. Jair Bolsonaro's ineligibility due to his prior conviction and imprisonment has shifted the right-wing candidacy to his son Flávio, who received his father's endorsement, keeping the contest polarized between established left- and right-wing bases. Recent audio leaks linking Flávio to a banking scandal have surfaced but appear not to have shifted the early polling trajectory, where the two frontrunners remain positioned well ahead of the field. With no candidate expected to secure an outright majority, traders focus on the two-round system that advances the top vote-getters to the October 25 runoff, and scheduled campaign milestones through the summer will test whether other challengers can close the gap.