Flávio Bolsonaro holds a commanding lead in recent São Paulo polling for the October 4 first round, reflecting sustained momentum in Brazil’s largest electoral base. Multiple surveys, including Quaest and Real Time Big Data, place the Liberal Party senator ahead of incumbent President Lula by margins of three to six points, with all other listed candidates remaining in single digits. Heavy late-campaign focus on the state, coordination with Governor Tarcísio de Freitas, and elevated rejection rates for Lula among paulista voters have reinforced this positioning. Traders price the outcome at 95 percent for Bolsonaro, consistent with the wisdom-of-crowds assessment of current data. A narrow polling lead nationally and roughly 10–20 percent undecided or blank voters leave room for shifts before election day, though no other contender shows comparable statewide organization or support at this stage.