Incumbent Sen. Mike Rounds holds a commanding trader consensus at 80.5% implied probability to win South Dakota's June 2 Republican Senate primary, driven by his January reelection announcement, strong 2020 primary victory (75%-25%), and incumbency advantages in the deep-red state where no major challengers have committed resources. Navy veteran Justin McNeal's March 15 grassroots campaign launch—emphasizing debt reduction and term limits—lifted his odds to 3.2%, signaling early conservative dissatisfaction. Former DHS Secretary Kristi Noem's odds linger at 5.7% amid post-departure speculation since early March, including her March 24 replacement by Markwayne Mullin, but traders discount unconfirmed entry amid her national profile uncertainties. Absent polls, consensus favors Rounds absent late shifts.
Resumo experimental gerado por IA com dados do Polymarket · AtualizadoVencedor das primárias republicanas do Senado da Dakota do Sul
Vencedor das primárias republicanas do Senado da Dakota do Sul
Mike Rounds 87%
Kristi Noem 5.9%
Justin McNeal 3.3%
Mike Rounds
82%
Kristi Noem
6%
Justin McNeal
3%
Mike Rounds 87%
Kristi Noem 5.9%
Justin McNeal 3.3%
Mike Rounds
82%
Kristi Noem
6%
Justin McNeal
3%
If no 2026 South Dakota Republican Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the South Dakota Republican party, however an overwhelming consensus of credible reporting may suffice.
Mercado Aberto: Feb 25, 2026, 6:15 PM ET
Resolver
0x69c47De9D...If no 2026 South Dakota Republican Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the South Dakota Republican party, however an overwhelming consensus of credible reporting may suffice.
Resolver
0x69c47De9D...Incumbent Sen. Mike Rounds holds a commanding trader consensus at 80.5% implied probability to win South Dakota's June 2 Republican Senate primary, driven by his January reelection announcement, strong 2020 primary victory (75%-25%), and incumbency advantages in the deep-red state where no major challengers have committed resources. Navy veteran Justin McNeal's March 15 grassroots campaign launch—emphasizing debt reduction and term limits—lifted his odds to 3.2%, signaling early conservative dissatisfaction. Former DHS Secretary Kristi Noem's odds linger at 5.7% amid post-departure speculation since early March, including her March 24 replacement by Markwayne Mullin, but traders discount unconfirmed entry amid her national profile uncertainties. Absent polls, consensus favors Rounds absent late shifts.
Resumo experimental gerado por IA com dados do Polymarket · Atualizado
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