83% — Will Barack Obama endorse Graham Platner in Maine Senate before Nov 3, 2026
Leader: Jon Ossoff at 83% · Kalshi 83% · 7 contracts · $0 volume · medium confidence
Updated 2026-09-20 17:30:52 UTC

Tracks the leading outcome in a winner-take-all prediction market set with 7 outcomes.

Why this matters:
This probability reflects market expectations that Barack Obama will endorse Graham Platner in the Maine Senate race before Election Day on November 3, 2026. The 83% price indicates high confidence in such an endorsement occurring. Key drivers include Obama's historical pattern of selective endorsements in competitive Senate races, his relationship with Maine's Democratic establishment, and the timing of when Democratic primary contests conclude. The main uncertainty centers on whether Obama views the Maine race as sufficiently competitive or strategically important to warrant a public endorsement. The resolution will depend on Obama's stated public positions and any official endorsement announcements between now and Election Day. High-profile Democratic endorsements typically cluster in the final weeks before general elections or during primary contests when races tighten.

Key factors:
- Obama's recent endorsement activity in other 2026 races, particularly whether he has already committed to endorsing Jon Ossoff in Georgia (priced at 83%) or other candidates
- The competitiveness of the Maine Senate race and whether it reaches polling thresholds that historically trigger Obama's involvement in Senate endorsements
- The timing of Maine's election cycle and primary calendar relative to when Obama typically makes endorsement announcements
- Whether Graham Platner is the Democratic nominee and has secured Democratic Party establishment support before potential endorsement opportunities arise
- Public statements or reported discussions from Obama's team or Maine Democratic leadership regarding endorsement strategy for the 2026 cycle

Contracts:
- Will Barack Obama endorse Jon Ossoff in Georgia Senate before Nov 3, 2026?: Jon Ossoff — 83¢ Kalshi $0 (weight 14%)
- Will Barack Obama endorse Mary Peltola in Alaska Senate before Nov 3, 2026?: Mary Peltola — 63¢ Kalshi $0 (weight 14%)
- Will Barack Obama endorse Roy Cooper in North Carolina Senate before Nov 3, 2026?: Roy Cooper — 39¢ Kalshi $0 (weight 14%)
- Will Barack Obama endorse Sherrod Brown in Ohio Senate before Nov 3, 2026?: Sherrod Brown — 37¢ Kalshi $0 (weight 14%)
- Will Barack Obama endorse Karen Bass in Los Angeles Mayor before Nov 3, 2026?: Karen Bass — 17¢ Kalshi $0 (weight 14%)
- Will Barack Obama endorse Dan Osborn in Nebraska Senate before Nov 3, 2026?: Dan Osborn — 14¢ Kalshi $0 (weight 14%)
- Will Barack Obama endorse Keisha Lance Bottoms in Georgia Governor before Nov 3, 2026?: Keisha Lance Bottoms — 8¢ Kalshi $0 (weight 14%)

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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: 2026-09-18T07:20:51.673Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "83% per prediction markets (SimpleFunctions, September 2026)"
Canonical: https://simplefunctions.dev/answer/obamaendorse
Full data: https://simplefunctions.dev/api/public/query?q=Will%20Barack%20Obama%20endorse%20Graham%20Platner%20in%20Maine%20Senate%20before%20Nov%203%2C%202026
Provider: SimpleFunctions — https://simplefunctions.dev