State of the OddsUS election odds from every prediction market

Kansas Senate Race Odds 2026

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

Adam HamiltonD leads at 66% across 4 venues: Kalshi 66%, Polymarket US 65%, PredictIt 75%, Polymarket 64%. Roger MarshallR is at 35%.

Market consensus
66%
Adam Hamilton to win, median of 4 venues
Forecasters
Toss-up
Cook, Inside Elections, Sabato consensus
Seat
MarshallR
incumbent running
2024 presidential
R +16.2
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
Adam HamiltonD
Pastor, founder of the Church of the Resurrection; won an eight-way primary with 34.6%
66%
bid 65¢ · ask 66¢ · OI $3.5M
65%
ask 66¢
75%
buy 76¢
64%
vol $1.4M
66%
Roger MarshallR incumbent
Senator since 2021, seeking a second term; won primary with 79.9%
36%
bid 35¢ · ask 36¢ · OI $3.4M
35%
ask 36¢
21%
buy 33¢
36%
vol $1.4M
35%
David C. GrahamL
Attorney, 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 Adam Hamilton. 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.

Kansas Senate 2026 · Kalshi · Adam Hamilton · Polymarket · Adam Hamilton (D) · last 90 days
0%25%50%75%100%SepOctNovPolymarket · Adam Hamilton (D) 64%Kalshi · Adam Hamilton 62%

The race

Seat
Roger MarshallR
running for re-election · in office since 2021
Ratings
Toss-up Cook · Toss-up Inside · Lean D Sabato
consensus Toss-up, as of November 2, 2026
Last election (2020)
Roger MarshallR R +11.4
53.2% to Barbara Bollier 41.8%
2024 presidential
R +16.2
Primary
August 4, 2026
Filing deadline
June 1, 2026
General election
November 3, 2026

The forecasters' consensus rating is Toss-up, favouring the Democrat. The markets' consensus has Adam HamiltonD at 66%. The market leader is not the incumbent party, so the markets price a flip. What a price means.

How the Kalshi market resolves

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

Related races

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