PL holds a clear lead in the Chamber of Deputies race due to its established role as the primary vehicle for conservative voters aligned with Jair Bolsonaro’s political legacy, reinforced by strong 2022 results and sustained congressional influence despite the former president’s ineligibility. Traders price UPB—the federation uniting Brazil Union and Progressistas—as the main challenger, reflecting its large existing bloc and centrist-conservative appeal ahead of the October 4 vote. Recent campaign developments, including party conventions, presidential ticket alignments, and ongoing congressional dynamics under the Lula administration, have kept these two groupings dominant while leaving little room for smaller parties. The narrow gap between the leaders underscores uncertainty over how presidential coattails and voter turnout will shape final seat totals.