35% — Will Brent Barker be the Republican nominee for the Senate in Oregon
Kalshi 35% · 3 contracts · $741 volume · medium confidence
Updated 2026-05-25 00:32:15 UTC

Why this matters:
This probability indicates the likelihood that Brent Barker wins the Republican primary for Oregon's U.S. Senate seat. Currently at 32%, it reflects market expectations that Barker faces significant competition in what appears to be a multi-candidate field. David Brock Smith is the current frontrunner at 72%, with Jo Rae Perkins polling third at 22%, suggesting the Republican primary will be contested among at least three candidates. The probability would shift based on candidate momentum, endorsements, fundraising totals, and polling data as the primary election approaches. Oregon Republicans typically hold their primary in May, making the timing of campaign developments and voter engagement crucial to determining the eventual nominee. The outcome depends heavily on which candidate consolidates support among the party base and generates turnout in the primary election.

Key factors:
- David Brock Smith leads market expectations at 72%, indicating Barker is a distant second among likely Republican nominees
- Market volume on the Barker contract is minimal ($50 in 24h volume) compared to Smith ($502), suggesting limited trading activity and potentially less certainty in pricing
- Oregon's Republican primary election date and the remaining campaign timeline will affect candidate viability and voter consolidation patterns
- Barker's current 32% probability implies markets view him as a significant underdog despite competing in a three-way race
- Endorsements, fundraising reports, and any public polling data released before the primary could substantially shift this probability

Contracts:
- Will David Brock Smith be the Republican nominee for the Senate in Oregon?: David Brock Smith — 80¢ Kalshi $489 (weight 66%)
- Will Jo Rae Perkins be the Republican nominee for the Senate in Oregon?: Jo Rae Perkins — 21¢ Kalshi $252 (weight 34%)
- Will Brent Barker be the Republican nominee for the Senate in Oregon?: Brent Barker — 3¢ Kalshi $0 (weight 0%)

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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: 2026-05-23T07:20:12.596Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "35% per prediction markets (SimpleFunctions, May 2026)"
Canonical: https://simplefunctions.dev/answer/senateorr
Full data: https://simplefunctions.dev/api/public/query?q=Will%20Brent%20Barker%20be%20the%20Republican%20nominee%20for%20the%20Senate%20in%20Oregon
Provider: SimpleFunctions — https://simplefunctions.dev