The 2026 Maine Senate contest pits long-serving Republican incumbent Susan Collins against Democratic nominee Graham Platner, an oyster farmer and veteran who secured the nomination after Governor Janet Mills withdrew in April and won the June 9 primary by a wide margin. Recent June polling shows a toss-up or narrow Platner edge in head-to-head matchups, consistent with Maine’s Democratic lean in presidential voting and Collins’ status as the state’s sole remaining Republican in Congress. Trader consensus at 66.5% for a Democratic win reflects the state’s partisan baseline and the competitive positioning of an untested challenger against an incumbent who has historically built cross-party support, with months remaining before the November 3 election allowing for shifts driven by national conditions or candidate developments.
Résumé expérimental généré par IA à partir des données Polymarket. Ceci n'est pas un conseil de trading et ne joue aucun rôle dans la résolution de ce marché. · Mis à jourVainqueur des élections sénatoriales du Maine
$524,991 Vol.
$524,991 Vol.

Démocrate
67%

Républicain
35%
$524,991 Vol.
$524,991 Vol.

Démocrate
67%

Républicain
35%
A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Marché ouvert : Oct 13, 2025, 5:28 PM ET
Resolver
0x2F5e3684c...A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Resolver
0x2F5e3684c...The 2026 Maine Senate contest pits long-serving Republican incumbent Susan Collins against Democratic nominee Graham Platner, an oyster farmer and veteran who secured the nomination after Governor Janet Mills withdrew in April and won the June 9 primary by a wide margin. Recent June polling shows a toss-up or narrow Platner edge in head-to-head matchups, consistent with Maine’s Democratic lean in presidential voting and Collins’ status as the state’s sole remaining Republican in Congress. Trader consensus at 66.5% for a Democratic win reflects the state’s partisan baseline and the competitive positioning of an untested challenger against an incumbent who has historically built cross-party support, with months remaining before the November 3 election allowing for shifts driven by national conditions or candidate developments.
Résumé expérimental généré par IA à partir des données Polymarket. Ceci n'est pas un conseil de trading et ne joue aucun rôle dans la résolution de ce marché. · Mis à jour
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