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  1. Prediction Markets
  2. Politics
  3. 2026 Democratic nominee for US Senate in Maine?
Manifold Markets

2026 Democratic nominee for US Senate in Maine?

One-OffPoliticsUS PoliticsElection4mo
Manifold MarketsManifold MarketsNo KYC
Current community forecast
Manifold Markets
Janet Mills 0.4%
Leader of 7 outcomes
Forecasters

129

Question type

multiple choice

Methodology

Play-money forecasting platform

Source type

Forecast

Market data

Updated 1 minute ago

Aug 19, 25, 8:24 PMNov 4, 26, 4:59 AM

Trends

Outcome24hChance
Manifold Markets
Janet Mills
0.4%
Manifold Markets
Ryan Fecteau
0.1%
Manifold Markets
Cathy Breen
0.1%
Manifold Markets
Aaron Frey
0.1%

Selected outcome

Graham Platner94%

KalshiAlso available on Kalshi

Maine Democratic Senate nominee?

Maine Democratic Senate nominee?

0.6%Closed

Resolved

Graham Platner (100%)

Graham Platner
Graham Platner
+0.6%100%
Janet Mills
Janet Mills
-0.9%0%
David Costello
David Costello
1%

+6 more outcomes

91 • High qualityTight spreadHigh liquidity
Total Vol$62.2K
24h Vol$3.1K
KalshiKALSHI

Rules

Susan Collins (R-ME) is up for reelection in 2026.

Manifold Markets
  • Which Democrat will face her?
  • (Feel free to suggest additions, though I'll only add people who I subjectively think have a >2% chance of winning.)
  • Update 2026-06-04 (PST) (AI summary of creator comment): This market will resolve based on whoever appears on the November ballot, not the primary election result.
  • This accounts for potential candidate replacements after the July deadline.
  • Update 2026-06-04 (PST) (AI summary of creator comment): This market will resolve based on whoever appears on the November ballot as the Democratic nominee, not necessarily the primary election winner.

Probabilities may differ due to different market structures, fees, and participant pools.

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Rules

Susan Collins (R-ME) is up for reelection in 2026.

Manifold Markets
  • Which Democrat will face her?
  • (Feel free to suggest additions, though I'll only add people who I subjectively think have a >2% chance of winning.)
  • Update 2026-06-04 (PST) (AI summary of creator comment): This market will resolve based on whoever appears on the November ballot, not the primary election result.
  • This accounts for potential candidate replacements after the July deadline.
  • Update 2026-06-04 (PST) (AI summary of creator comment): This market will resolve based on whoever appears on the November ballot as the Democratic nominee, not necessarily the primary election winner.