Recent polling from July and early August shows a tight contest for Acre's two Senate seats, with Marcio Bittar, Gladson Cameli, Jorge Viana, and Mara Rocha clustered within the margin of error around 18-21 percent each. Bittar's position as incumbent and recent party alignments provide a modest edge in trader assessments, while Cameli's shift from the governorship and Viana's name recognition sustain competition. Candidacy registrations closed in mid-August with over two dozen entrants, fragmenting the field and sustaining uncertainty ahead of the October 4 vote. Further separation could emerge from late polling shifts, coalition endorsements, or turnout patterns among key regional voting blocs in the final weeks.