Incumbent Republican Mike Rounds secured the nomination with roughly 76% of the primary vote on June 2, 2026, defeating challenger Justin McNeal and advancing to face Democrat Julian Beaudion and independent Brian Bengs in the November general election. South Dakota’s consistent Republican voting patterns in federal races, Rounds’ long tenure as senator and former governor, and his substantial fundraising and organizational advantages underpin trader pricing that places the Republican outcome above 92%. Beaudion’s unopposed Democratic nomination and Bengs’ independent bid have not shifted the dynamics in this solidly red state, where Republicans have not lost a Senate contest since 2008. Late developments such as national political realignments, candidate health events, or unforeseen scandals remain the primary variables that could narrow the margin.
Resumen experimental generado por IA con datos de Polymarket. Esto no es asesoramiento de trading y no influye en cómo se resuelve este mercado. · ActualizadoGanador de las elecciones al Senado de Dakota del Sur

Republicano
93%

Demócrata
7%

Republicano
93%

Demócrata
7%
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.
Mercado abierto: Oct 13, 2025, 5:04 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 Republican Mike Rounds secured the nomination with roughly 76% of the primary vote on June 2, 2026, defeating challenger Justin McNeal and advancing to face Democrat Julian Beaudion and independent Brian Bengs in the November general election. South Dakota’s consistent Republican voting patterns in federal races, Rounds’ long tenure as senator and former governor, and his substantial fundraising and organizational advantages underpin trader pricing that places the Republican outcome above 92%. Beaudion’s unopposed Democratic nomination and Bengs’ independent bid have not shifted the dynamics in this solidly red state, where Republicans have not lost a Senate contest since 2008. Late developments such as national political realignments, candidate health events, or unforeseen scandals remain the primary variables that could narrow the margin.
Resumen experimental generado por IA con datos de Polymarket. Esto no es asesoramiento de trading y no influye en cómo se resuelve este mercado. · Actualizado
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