Recent polls from late August 2026 show a fragmented field for Paraná's two Senate seats, with Alexandre Curi, Deltan Dallagnol, Filipe Barros, Gleisi Hoffmann, and Cristina Graeml clustered within a few points in consolidated first-and-second vote measures. Deltan's ongoing eligibility challenge before electoral courts remains a central variable that could reduce his viability or shift preferences toward alternatives. High numbers of undecided voters and blank/null responses across surveys keep the path to first place open, while the October 4 voting date and any late campaign developments or court rulings could alter positioning among the leading contenders in this competitive multi-candidate contest.