**Vicentinho Júnior (PSDB) leads the Polymarket odds at 61.5% for the Tocantins governor runoff against Professora Dorinha (União) at 40%, with other first-round candidates at minimal levels consistent with their elimination.** The October 4 first-round results produced a tight finish, as Dorinha captured 45.5% of valid votes and Vicentinho 43.9%, advancing both to the October 25 second round while Laurez Moreira (PSD) placed third at roughly 8%. Dorinha entered as the polling frontrunner with backing from outgoing Governor Wanderlei Barbosa (Republicanos) and a strong education-focused profile from her Senate and prior state roles. Vicentinho, a federal deputy who switched to the PSDB earlier in 2026, narrowed the gap in the campaign's final weeks through alliances including the MDB and appeals to undecided or third-candidate voters. Post-first-round positioning shows both camps consolidating support ahead of the runoff, with no major new developments shifting the race in the intervening days. Market pricing reflects trader assessment of Vicentinho's momentum and coalition-building potential in the head-to-head contest.