Incumbent Sen. Mike Rounds (R) dominates the South Dakota U.S. Senate race, fueling trader consensus at 91.5% for a Republican winner ahead of the June 2 primary against challenger Justin McNeal. A Mason-Dixon poll from April 7-11 showed Rounds leading 66%-18%, underscoring his incumbency advantage and fundraising edge ($2.9 million cash on hand vs. McNeal's $1,500). South Dakota's R+15 partisan lean, Trump's 63% 2024 win, and Democrats' statewide struggles—failing to field candidates in over half of legislative seats—bolster the GOP hold against Democrat Julian Beaudion and independent Brian Bengs, who qualified April 28. Late-breaking scandals, health issues, or a primary upset weakening the nominee could challenge this outlook, though historical base rates favor Republicans in safe seats.
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
Ganador de las elecciones al Senado de Dakota del Sur

Republicano
93%

Demócrata
3%

Republicano
93%

Demócrata
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.
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 Sen. Mike Rounds (R) dominates the South Dakota U.S. Senate race, fueling trader consensus at 91.5% for a Republican winner ahead of the June 2 primary against challenger Justin McNeal. A Mason-Dixon poll from April 7-11 showed Rounds leading 66%-18%, underscoring his incumbency advantage and fundraising edge ($2.9 million cash on hand vs. McNeal's $1,500). South Dakota's R+15 partisan lean, Trump's 63% 2024 win, and Democrats' statewide struggles—failing to field candidates in over half of legislative seats—bolster the GOP hold against Democrat Julian Beaudion and independent Brian Bengs, who qualified April 28. Late-breaking scandals, health issues, or a primary upset weakening the nominee could challenge this outlook, though historical base rates favor Republicans in safe seats.
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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