PL leads the trader consensus at 85% for most seats after the October 4, 2026, election of 54 Senate seats because it enters as the largest bloc with 16 current seats and fields the strongest slate of candidates across states, backed by the Liberal Party’s alignment with the Bolsonaro political movement. Flávio Bolsonaro’s presidential bid under the PL banner creates expected coattails in concurrent races, while the party has pursued aggressive recruitment of viable contenders. Fragmented center and center-right parties such as MDB, PSD, and PP trail significantly in implied probability, reflecting weaker unified national organization and fewer competitive state-level prospects. No major late shifts in alliances or candidate viability have altered this positioning in recent weeks.