Incumbent Republican Sen. Roger Marshall's unopposed primary path and Kansas's deep-red partisan lean—R+13 Cook PVI, with no Democratic Senate win since 1932—anchor trader consensus at 80.5% for a GOP victory in the November 3 general election. Marshall, who won by 11 points in 2020, benefits from strong incumbency and GOP legislative supermajorities. A crowded Democratic primary on August 4, featuring state Sen. Patrick Schmidt, pastor Adam Hamilton, and others, risks producing a fragmented nominee ahead of the June 1 filing deadline. Last week's GQR poll (April 23-27) showed Marshall leading Schmidt 49-45 initially but trailing 47-48 post-profile, yet sparse polling and historical base rates keep odds firmly Republican despite this outlier.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$27,057 Vol.
$27,057 Vol.

Republican
81%

Democrat
20%
$27,057 Vol.
$27,057 Vol.

Republican
81%

Democrat
20%
A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Market Opened: Oct 13, 2025, 5:28 PM ET
Resolver
0x2F5e3684c...A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Resolver
0x2F5e3684c...Incumbent Republican Sen. Roger Marshall's unopposed primary path and Kansas's deep-red partisan lean—R+13 Cook PVI, with no Democratic Senate win since 1932—anchor trader consensus at 80.5% for a GOP victory in the November 3 general election. Marshall, who won by 11 points in 2020, benefits from strong incumbency and GOP legislative supermajorities. A crowded Democratic primary on August 4, featuring state Sen. Patrick Schmidt, pastor Adam Hamilton, and others, risks producing a fragmented nominee ahead of the June 1 filing deadline. Last week's GQR poll (April 23-27) showed Marshall leading Schmidt 49-45 initially but trailing 47-48 post-profile, yet sparse polling and historical base rates keep odds firmly Republican despite this outlier.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated



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