64% — Maine Senate Election Winner
Leader: Democrat at 64% · Polymarket 64% · 2 contracts · $597 volume · low confidence
Updated 2026-06-21 10:43:09 UTC

Tracks the leading outcome in a winner-take-all prediction market set with 2 outcomes.

Why this matters:
Markets are currently pricing the Democratic candidate as a 72% favorite to win Maine's 2026 Senate seat, implying roughly a 3-to-1 odds advantage over the Republican challenger. This reflects Maine's recent electoral lean—the state has voted Democratic in presidential races since 2004 and elected a Democratic governor in 2022. The probability could shift substantially based on candidate performance, fundraising gaps, or demographic turnout patterns in the lead-up to November 2026. The general election on November 3, 2026, will ultimately resolve this outcome. Meaningful movement might occur following candidate announcements, primary results if contested, or major campaign events. The higher trading volume on the Republican contract ($17,426 in 24-hour volume versus $6,330 for Democrats) suggests active hedging or skepticism about the current Democratic lean among some traders.

Key factors:
- Maine has voted Democratic in presidential elections consistently since 2004, establishing a structural Democratic advantage in statewide races
- Republican contract volume is 2.75x higher than Democratic contract volume despite lower Republican pricing, indicating potential disagreement between price and trading interest
- The Democrat-Republican price differential (42 cents) implies a significant but not overwhelming advantage, leaving material room for the underdog candidate to gain ground
- Incumbent status, candidate quality, and campaign fundraising disparities remain unspecified variables that typically drive Senate race probabilities
- No scheduled primary elections or key campaign milestones are evident, suggesting current pricing reflects baseline structural conditions rather than recent campaign developments

Contracts:
- Maine Senate Election Winner: Democrat — 64¢ Polymarket $503 (weight 84%)
- Maine Senate Election Winner: Republican — 37¢ Polymarket $94 (weight 16%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-06-19T01:20:20.801Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "64% per prediction markets (SimpleFunctions, June 2026)"
Canonical: https://simplefunctions.dev/answer/maine-senate-election-winner
Full data: https://simplefunctions.dev/api/public/query?q=Maine%20Senate%20Election%20Winner
Provider: SimpleFunctions — https://simplefunctions.dev