Oklahoma's firmly Republican electorate and the state's consistent support for GOP Senate candidates over recent cycles underpin the market's strong tilt toward a Republican victor in the 2026 contest. The seat became open after Markwayne Mullin's March 2026 resignation to join the Trump administration, with Alan Armstrong appointed as interim senator but barred from seeking a full term. Republican primary voters head to the polls on June 16 with Kevin Hern positioned as the frontrunner in recent polling, while a crowded Democratic primary features multiple lesser-known contenders. Cook Political Report rates the race Solid Republican, and historical voting patterns plus limited Democratic infrastructure in the state limit crossover potential. A major scandal, unusually weak Republican nominee, or significant national midterm backlash could narrow the gap, though such shifts remain uncommon in this environment.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$14,591 Vol.
$14,591 Vol.

Republican
92%

Democrat
7%
$14,591 Vol.
$14,591 Vol.

Republican
92%

Democrat
7%
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, 4:48 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...Oklahoma's firmly Republican electorate and the state's consistent support for GOP Senate candidates over recent cycles underpin the market's strong tilt toward a Republican victor in the 2026 contest. The seat became open after Markwayne Mullin's March 2026 resignation to join the Trump administration, with Alan Armstrong appointed as interim senator but barred from seeking a full term. Republican primary voters head to the polls on June 16 with Kevin Hern positioned as the frontrunner in recent polling, while a crowded Democratic primary features multiple lesser-known contenders. Cook Political Report rates the race Solid Republican, and historical voting patterns plus limited Democratic infrastructure in the state limit crossover potential. A major scandal, unusually weak Republican nominee, or significant national midterm backlash could narrow the gap, though such shifts remain uncommon in this environment.
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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