Oklahoma’s solidly Republican political environment anchors trader consensus around a Republican victory in the 2026 Senate race. The seat opened after Markwayne Mullin resigned to join the Trump administration, with the interim appointee barred from running; U.S. Representative Kevin Hern secured the GOP nomination in the June primary. Recent polls show Hern leading the eventual Democratic nominee by roughly 20 points in a state Donald Trump carried by more than 34 points in 2024, consistent with historical Republican margins in statewide contests. Democratic candidates advanced from a low-turnout June primary to an August 25 runoff with limited fundraising and name recognition. A Republican win probability above 90 percent could shift only with a major late scandal, health event, or dramatic national political realignment before November.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$19,316 Vol.
$19,316 Vol.

Republican
96%

Democrat
3%
$19,316 Vol.
$19,316 Vol.

Republican
96%

Democrat
3%
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 solidly Republican political environment anchors trader consensus around a Republican victory in the 2026 Senate race. The seat opened after Markwayne Mullin resigned to join the Trump administration, with the interim appointee barred from running; U.S. Representative Kevin Hern secured the GOP nomination in the June primary. Recent polls show Hern leading the eventual Democratic nominee by roughly 20 points in a state Donald Trump carried by more than 34 points in 2024, consistent with historical Republican margins in statewide contests. Democratic candidates advanced from a low-turnout June primary to an August 25 runoff with limited fundraising and name recognition. A Republican win probability above 90 percent could shift only with a major late scandal, health event, or dramatic national political realignment before November.
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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