Janaina Riva (MDB) leads the 2nd-place market at 63% amid consistent polling showing her as the strongest challenger behind frontrunner Mauro Mendes (União). Recent surveys, including Real Time Big Data (late August/early September) and Paraná Pesquisas (mid-August), place Mendes first in consolidated first- and second-vote intentions at 27-52%, with Riva second at 26-34% and clear separation from the middle pack of Carlos Fávaro (PSD), Zé Medeiros (PL), and Pedro Taques (PSB) at 13-19%. Riva’s edge stems from stronger performance in second-vote scenarios and sustained support among women voters, while the October 4 election features two Senate seats elected in a single round with elevated undecided shares still shaping final positioning.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedJanaina Riva 64%
Mauro Mendes 18%
Pedro Taques 2.7%
Fávaro 2.1%
$22,927 Vol.
$22,927 Vol.
Oct 4, 2026
Janaina Riva
64%
Mauro Mendes
18%
Pedro Taques
3%
Fávaro
2%
Jose Medeiros
1%
Margareth Buzetti
<1%
Professor Nelson Ferreira
<1%
Coronel Darwin
<1%
Galvan
<1%
Beny Godoy
<1%
Janaina Riva 64%
Mauro Mendes 18%
Pedro Taques 2.7%
Fávaro 2.1%
$22,927 Vol.
$22,927 Vol.
Oct 4, 2026
Janaina Riva
$12,788 Vol.
64%
Mauro Mendes
$5,919 Vol.
18%
Pedro Taques
$634 Vol.
3%
Fávaro
$542 Vol.
2%
Jose Medeiros
$507 Vol.
1%
Margareth Buzetti
$495 Vol.
<1%
Professor Nelson Ferreira
$491 Vol.
<1%
Coronel Darwin
$491 Vol.
<1%
Galvan
$564 Vol.
<1%
Beny Godoy
$496 Vol.
<1%
The Brazilian Federal Senate election for Mato Grosso is scheduled to take place on October 4, 2026.
This market will resolve according to the candidate who wins the second-most valid votes of any candidate at the specified election.
Candidates will be primarily ranked by order of valid votes won. If two or more candidates are tied for any position, ties will be broken by alphabetical order of the candidates’ listed full names as they appear in this market. This market will resolve to the candidate that occupies the second-highest finishing position after applying this ranking.
If the result of this election isn't definitively known by June 30, 2027, 11:59 PM ET, the market will resolve to "Other".
This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., www.tse.jus.br/eleicoes/resultados-eleicoes).Janaina Riva (MDB) leads the 2nd-place market at 63% amid consistent polling showing her as the strongest challenger behind frontrunner Mauro Mendes (União). Recent surveys, including Real Time Big Data (late August/early September) and Paraná Pesquisas (mid-August), place Mendes first in consolidated first- and second-vote intentions at 27-52%, with Riva second at 26-34% and clear separation from the middle pack of Carlos Fávaro (PSD), Zé Medeiros (PL), and Pedro Taques (PSB) at 13-19%. Riva’s edge stems from stronger performance in second-vote scenarios and sustained support among women voters, while the October 4 election features two Senate seats elected in a single round with elevated undecided shares still shaping final positioning.
The Brazilian Federal Senate election for Mato Grosso is scheduled to take place on October 4, 2026.
This market will resolve according to the candidate who wins the second-most valid votes of any candidate at the specified election.
Candidates will be primarily ranked by order of valid votes won. If two or more candidates are tied for any position, ties will be broken by alphabetical order of the candidates’ listed full names as they appear in this market. This market will resolve to the candidate that occupies the second-highest finishing position after applying this ranking.
If the result of this election isn't definitively known by June 30, 2027, 11:59 PM ET, the market will resolve to "Other".
This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., www.tse.jus.br/eleicoes/resultados-eleicoes).
This market will resolve according to the candidate who wins the second-most valid votes of any candidate at the specified election.
Candidates will be primarily ranked by order of valid votes won. If two or more candidates are tied for any position, ties will be broken by alphabetical order of the candidates’ listed full names as they appear in this market. This market will resolve to the candidate that occupies the second-highest finishing position after applying this ranking.
If the result of this election isn't definitively known by June 30, 2027, 11:59 PM ET, the market will resolve to "Other".
This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., www.tse.jus.br/eleicoes/resultados-eleicoes).
Market Opened: Aug 17, 2026, 6:03 AM ET
Volume
$22,927End Date
Oct 4, 2026Market Opened
Aug 17, 2026, 6:03 AM ETResolver
0x69c47De9D...The Brazilian Federal Senate election for Mato Grosso is scheduled to take place on October 4, 2026.
This market will resolve according to the candidate who wins the second-most valid votes of any candidate at the specified election.
Candidates will be primarily ranked by order of valid votes won. If two or more candidates are tied for any position, ties will be broken by alphabetical order of the candidates’ listed full names as they appear in this market. This market will resolve to the candidate that occupies the second-highest finishing position after applying this ranking.
If the result of this election isn't definitively known by June 30, 2027, 11:59 PM ET, the market will resolve to "Other".
This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., www.tse.jus.br/eleicoes/resultados-eleicoes).Janaina Riva (MDB) leads the 2nd-place market at 63% amid consistent polling showing her as the strongest challenger behind frontrunner Mauro Mendes (União). Recent surveys, including Real Time Big Data (late August/early September) and Paraná Pesquisas (mid-August), place Mendes first in consolidated first- and second-vote intentions at 27-52%, with Riva second at 26-34% and clear separation from the middle pack of Carlos Fávaro (PSD), Zé Medeiros (PL), and Pedro Taques (PSB) at 13-19%. Riva’s edge stems from stronger performance in second-vote scenarios and sustained support among women voters, while the October 4 election features two Senate seats elected in a single round with elevated undecided shares still shaping final positioning.
The Brazilian Federal Senate election for Mato Grosso is scheduled to take place on October 4, 2026.
This market will resolve according to the candidate who wins the second-most valid votes of any candidate at the specified election.
Candidates will be primarily ranked by order of valid votes won. If two or more candidates are tied for any position, ties will be broken by alphabetical order of the candidates’ listed full names as they appear in this market. This market will resolve to the candidate that occupies the second-highest finishing position after applying this ranking.
If the result of this election isn't definitively known by June 30, 2027, 11:59 PM ET, the market will resolve to "Other".
This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., www.tse.jus.br/eleicoes/resultados-eleicoes).
This market will resolve according to the candidate who wins the second-most valid votes of any candidate at the specified election.
Candidates will be primarily ranked by order of valid votes won. If two or more candidates are tied for any position, ties will be broken by alphabetical order of the candidates’ listed full names as they appear in this market. This market will resolve to the candidate that occupies the second-highest finishing position after applying this ranking.
If the result of this election isn't definitively known by June 30, 2027, 11:59 PM ET, the market will resolve to "Other".
This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., www.tse.jus.br/eleicoes/resultados-eleicoes).
Volume
$22,927End Date
Oct 4, 2026Market Opened
Aug 17, 2026, 6:03 AM ETResolver
0x69c47De9D...Janaina Riva (MDB) leads the 2nd-place market at 63% amid consistent polling showing her as the strongest challenger behind frontrunner Mauro Mendes (União). Recent surveys, including Real Time Big Data (late August/early September) and Paraná Pesquisas (mid-August), place Mendes first in consolidated first- and second-vote intentions at 27-52%, with Riva second at 26-34% and clear separation from the middle pack of Carlos Fávaro (PSD), Zé Medeiros (PL), and Pedro Taques (PSB) at 13-19%. Riva’s edge stems from stronger performance in second-vote scenarios and sustained support among women voters, while the October 4 election features two Senate seats elected in a single round with elevated undecided shares still shaping final positioning.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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