Incumbent-free after Sen. Markwayne Mullin's March 2026 resignation to lead DHS—followed by Gov. Kevin Stitt's appointment of Alan Armstrong as interim—Oklahoma's open U.S. Senate seat favors Republicans at 92.5% trader consensus, driven by Rep. Kevin Hern's commanding GOP primary position with over $8 million raised, endorsements from Donald Trump and Sen. James Lankford, and a March poll showing him at 52% among likely voters. Oklahoma's deep-red status, evidenced by consistent Republican double-digit margins in recent cycles, and Democrats' underfunded primary field reinforce this. The June 16 primary looms as a key test, though a GOP nominee scandal, national Democratic wave, or unexpected voter turnout surge could narrow odds before November 3 resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$13,331 Vol.
$13,331 Vol.

Republican
93%

Democrat
6%
$13,331 Vol.
$13,331 Vol.

Republican
93%

Democrat
6%
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...Incumbent-free after Sen. Markwayne Mullin's March 2026 resignation to lead DHS—followed by Gov. Kevin Stitt's appointment of Alan Armstrong as interim—Oklahoma's open U.S. Senate seat favors Republicans at 92.5% trader consensus, driven by Rep. Kevin Hern's commanding GOP primary position with over $8 million raised, endorsements from Donald Trump and Sen. James Lankford, and a March poll showing him at 52% among likely voters. Oklahoma's deep-red status, evidenced by consistent Republican double-digit margins in recent cycles, and Democrats' underfunded primary field reinforce this. The June 16 primary looms as a key test, though a GOP nominee scandal, national Democratic wave, or unexpected voter turnout surge could narrow odds before November 3 resolution.
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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