**The Federal District Senate race for the October 4, 2026, election features a highly fragmented field for second place behind the clear frontrunner, Michelle Bolsonaro (PL), whose strong polling lead reflects consolidated right-wing support in Brasília.** Multiple candidates cluster in the low-to-mid 20s in trader pricing for second, including Bia Kicis (PL), David Horn, Marley, Avenir Rosa, Tiago, Erika Kokay (PT), Leila do Vôlei (PDT), and Ronaldo Fonseca. This tightness stems from vote splitting across right-leaning names aligned with the Bolsonaro orbit, center-right figures, and left-leaning options, with no single contender establishing a durable polling edge in recent surveys. Recent party conventions and Michelle’s formal entry have sharpened right-wing consolidation around her ticket while leaving secondary contenders competing for the same base; simultaneous left and center polling strength for names like Leila and Erika adds further dispersion. Traders price the outcome near even odds among the top tier because the race remains sensitive to late shifts in turnout, endorsements, or withdrawals in the final weeks before voting. Scheduled campaign events, alliance negotiations, and any movement in rejection ratings or name recognition could quickly reorder probabilities ahead of election night.