Incumbent Sen. Markwayne Mullin's March 23 resignation to serve as DHS Secretary under President Trump opened Oklahoma's Senate seat, prompting U.S. Rep. Kevin Hern's March 11 entry with endorsements from Trump, Senate Majority Leader John Thune, and Sen. James Lankford, plus $2.2 million cash on hand. This solidifies trader consensus at 93.5% for Republican victory in the deeply red state, where Trump won by 34 points in 2024 and GOP Senate margins average over 66% historically. Democrats field fragmented primary contenders like Jim Priest and N'Kiyla Thomas with minimal fundraising. The June 16 primary looms; a weak GOP nominee from upset or Hern scandal could narrow odds, though national Democratic wave remains unlikely given Oklahoma's all-Republican congressional delegation and trifecta control.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$11,621 Vol.
$11,621 Vol.

Republican
94%

Democrat
5%
$11,621 Vol.
$11,621 Vol.

Republican
94%

Democrat
5%
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 Sen. Markwayne Mullin's March 23 resignation to serve as DHS Secretary under President Trump opened Oklahoma's Senate seat, prompting U.S. Rep. Kevin Hern's March 11 entry with endorsements from Trump, Senate Majority Leader John Thune, and Sen. James Lankford, plus $2.2 million cash on hand. This solidifies trader consensus at 93.5% for Republican victory in the deeply red state, where Trump won by 34 points in 2024 and GOP Senate margins average over 66% historically. Democrats field fragmented primary contenders like Jim Priest and N'Kiyla Thomas with minimal fundraising. The June 16 primary looms; a weak GOP nominee from upset or Hern scandal could narrow odds, though national Democratic wave remains unlikely given Oklahoma's all-Republican congressional delegation and trifecta control.
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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