Recent polling averages show Democratic challenger Graham Platner holding a consistent lead over incumbent Republican Senator Susan Collins in the November 2026 general election, a shift accelerated by Governor Janet Mills’ late-April suspension of her Senate bid. With the Democratic primary set for June 9, Platner’s strong primary performance has consolidated support among voters, including key blocs in Maine’s competitive districts. Traders assign an implied probability of 78.5 percent to a Democratic victory, reflecting the impact of Mills’ exit and Platner’s established edge in head-to-head surveys. The Republican path remains viable through Collins’ long record of cross-party appeal, though recent internal polling has noted erosion in traditionally strong areas. Upcoming primary results and fall campaign dynamics could still adjust the current market positioning.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedMaine Senate Election Winner
Maine Senate Election Winner
$245,901 Vol.
$245,901 Vol.
Nov 3, 2026
Democrat
79%
Republican
23%
$245,901 Vol.
$245,901 Vol.
Nov 3, 2026
Democrat
$148,427 Vol.
79%
Republican
$97,474 Vol.
23%
This market will resolve according to the winner of the 2026 midterm Maine U.S. Senate election, inclusive of any run-offs.
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.Recent polling averages show Democratic challenger Graham Platner holding a consistent lead over incumbent Republican Senator Susan Collins in the November 2026 general election, a shift accelerated by Governor Janet Mills’ late-April suspension of her Senate bid. With the Democratic primary set for June 9, Platner’s strong primary performance has consolidated support among voters, including key blocs in Maine’s competitive districts. Traders assign an implied probability of 78.5 percent to a Democratic victory, reflecting the impact of Mills’ exit and Platner’s established edge in head-to-head surveys. The Republican path remains viable through Collins’ long record of cross-party appeal, though recent internal polling has noted erosion in traditionally strong areas. Upcoming primary results and fall campaign dynamics could still adjust the current market positioning.
This market will resolve according to the winner of the 2026 midterm Maine U.S. Senate election, inclusive of any run-offs.
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.
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.
Market Opened: Oct 13, 2025, 5:28 PM ET
Volume
$245,901End Date
Nov 3, 2026Market Opened
Oct 13, 2025, 5:28 PM ETResolver
0x2F5e3684c...This market will resolve according to the winner of the 2026 midterm Maine U.S. Senate election, inclusive of any run-offs.
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.Recent polling averages show Democratic challenger Graham Platner holding a consistent lead over incumbent Republican Senator Susan Collins in the November 2026 general election, a shift accelerated by Governor Janet Mills’ late-April suspension of her Senate bid. With the Democratic primary set for June 9, Platner’s strong primary performance has consolidated support among voters, including key blocs in Maine’s competitive districts. Traders assign an implied probability of 78.5 percent to a Democratic victory, reflecting the impact of Mills’ exit and Platner’s established edge in head-to-head surveys. The Republican path remains viable through Collins’ long record of cross-party appeal, though recent internal polling has noted erosion in traditionally strong areas. Upcoming primary results and fall campaign dynamics could still adjust the current market positioning.
This market will resolve according to the winner of the 2026 midterm Maine U.S. Senate election, inclusive of any run-offs.
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.
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.
Volume
$245,901End Date
Nov 3, 2026Market Opened
Oct 13, 2025, 5:28 PM ETResolver
0x2F5e3684c...Recent polling averages show Democratic challenger Graham Platner holding a consistent lead over incumbent Republican Senator Susan Collins in the November 2026 general election, a shift accelerated by Governor Janet Mills’ late-April suspension of her Senate bid. With the Democratic primary set for June 9, Platner’s strong primary performance has consolidated support among voters, including key blocs in Maine’s competitive districts. Traders assign an implied probability of 78.5 percent to a Democratic victory, reflecting the impact of Mills’ exit and Platner’s established edge in head-to-head surveys. The Republican path remains viable through Collins’ long record of cross-party appeal, though recent internal polling has noted erosion in traditionally strong areas. Upcoming primary results and fall campaign dynamics could still adjust the current market 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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