State of the OddsUS election odds from every prediction market

Arkansas Senate Race Odds 2026

Prices as of 2026-11-03 22:50 UTC.

Tom CottonR leads at 97% across 4 venues: Kalshi 97%, Polymarket US 97%, PredictIt 96%, Polymarket 97%. Hallie ShoffnerD is at 3%.

Market consensus
97%
Tom Cotton to win, median of 4 venues
Forecasters
Solid R
Cook, Inside Elections, Sabato consensus
Seat
CottonR
incumbent running
2024 presidential
R +30.6
statewide margin

Final prices before polls closed

Frozen at 2026-11-03 22:47 UTC. The result is entered when the race is called and scored on the results ledger.

Candidates and prices

CandidateKalshiPolymarket USPredictItPolymarketConsensus
Tom CottonR incumbent
Senator since 2015, seeking a third term
97%
bid 97¢ · ask 97¢ · OI $212k
97%
ask 98¢
96%
buy 98¢
97%
vol $73k
97%
Hallie ShoffnerD
Farmer and entrepreneur; won Democratic primary with 78.3%
3%
bid 3¢ · ask 3¢ · OI $360k
3%
ask 4¢
3%
buy 5¢
3%
vol $57k
3%
Jeff WadlinL
Strategy consultant, Libertarian nominee
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Where to trade this race

Every book we know that takes this race, with the price it shows for Tom Cotton. The brokers trade Kalshi's contract at Kalshi's price. Partner books pay us a referral fee; the order is paying books first, which never changes a price.

Each book checks age and location at sign-up. How the sites compare.

Arkansas Senate 2026 · Kalshi · Tom Cotton · Polymarket · Tom Cotton (R) · last 90 days
0%25%50%75%100%SepOctNovPolymarket · Tom Cotton (R) 97%Kalshi · Tom Cotton 96%

The race

Seat
Tom CottonR
running for re-election · in office since 2015
Ratings
Solid R Cook · Solid R Inside · Solid R Sabato
consensus Solid R, as of October 30, 2026
Last election (2020)
Tom CottonR R +33.0
66.5% to Ricky Dale Harrington Jr. 33.5%
2024 presidential
R +30.6
Primary
March 3, 2026
runoff March 31, 2026
Filing deadline
November 11, 2025
General election
November 3, 2026

The forecasters' consensus rating is Solid R, favouring the Republican. The markets' consensus has Tom CottonR at 97%. What a price means.

How the Kalshi market resolves

If a representative of the Republican party is sworn in as a Senator of Arkansas for the term beginning in 2027, then the market resolves to Yes.

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