Trader consensus assigns a 93% implied probability to a Republican victory in Oklahoma's open U.S. Senate race, driven by the state's longstanding GOP stronghold status—Democrats last won in 1990—and recent consolidation of Republican support. Incumbent Sen. Markwayne Mullin's recent ascension to Secretary of Homeland Security vacated the seat, leading Rep. Kevin Hern to announce his candidacy on March 11, 2026, followed by President Trump's endorsement three days later, boosting Hern's standing in early primary polls ahead of the June 16 Republican primary. Democrats, with nominee Jasmine Thomas, face steep historical barriers including lopsided turnout and double-digit margins in recent cycles. Upsets could stem from a chaotic GOP primary yielding a weakened nominee or an unforeseen national Democratic surge.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$11,711 Vol.
$11,711 Vol.

Republican
93%

Democrat
5%
$11,711 Vol.
$11,711 Vol.

Republican
93%

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...Trader consensus assigns a 93% implied probability to a Republican victory in Oklahoma's open U.S. Senate race, driven by the state's longstanding GOP stronghold status—Democrats last won in 1990—and recent consolidation of Republican support. Incumbent Sen. Markwayne Mullin's recent ascension to Secretary of Homeland Security vacated the seat, leading Rep. Kevin Hern to announce his candidacy on March 11, 2026, followed by President Trump's endorsement three days later, boosting Hern's standing in early primary polls ahead of the June 16 Republican primary. Democrats, with nominee Jasmine Thomas, face steep historical barriers including lopsided turnout and double-digit margins in recent cycles. Upsets could stem from a chaotic GOP primary yielding a weakened nominee or an unforeseen national Democratic surge.
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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