Oklahoma's open U.S. Senate seat, vacated after Markwayne Mullin resigned to join the Trump administration, features Republican nominee Kevin Hern against Democrat N'Kiyla Jasmine Thomas. Hern secured the GOP nomination with a decisive primary win, backed by President Trump and strong fundraising that far outpaced Democratic efforts. The state’s consistent Republican dominance, including a 34-point Trump margin in 2024, and the absence of a Democratic Senate victory since 1990 underpin trader consensus around a commanding Republican edge. Recent August polling showed Hern ahead by roughly 20 points. Late developments such as a significant scandal, health issue, or sharp national political shift could narrow the gap, though structural factors limit realistic upset potential ahead of the November 3 election.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$19,335 Vol.
$19,335 Vol.

Republican
95%

Democrat
3%
$19,335 Vol.
$19,335 Vol.

Republican
95%

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 open U.S. Senate seat, vacated after Markwayne Mullin resigned to join the Trump administration, features Republican nominee Kevin Hern against Democrat N'Kiyla Jasmine Thomas. Hern secured the GOP nomination with a decisive primary win, backed by President Trump and strong fundraising that far outpaced Democratic efforts. The state’s consistent Republican dominance, including a 34-point Trump margin in 2024, and the absence of a Democratic Senate victory since 1990 underpin trader consensus around a commanding Republican edge. Recent August polling showed Hern ahead by roughly 20 points. Late developments such as a significant scandal, health issue, or sharp national political shift could narrow the gap, though structural factors limit realistic upset potential ahead of the November 3 election.
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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