Marty Jackley holds a commanding lead in the South Dakota at-large House race because the state has not elected a Democrat to Congress since 2008 and rates as solidly Republican across major forecasters. Jackley, the sitting attorney general, secured the GOP nomination in June 2026 with 79 percent of the primary vote and benefits from high statewide name recognition plus legislative accomplishments on public safety and transparency. Nikki Gronli, the Democratic nominee who ran unopposed in her primary, faces structural headwinds in a state where Republican candidates routinely win by wide margins. The November 3 general election occurs in an environment favoring the GOP nominee, though late shifts in turnout, candidate health, or major national events could still affect final results.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedSD-AL House Election Winner
$32,111 Vol.
$32,111 Vol.
Marty Jackley (R)
95%
Nikki Gronli (D)
4%
$32,111 Vol.
$32,111 Vol.
Marty Jackley (R)
95%
Nikki Gronli (D)
4%
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).
Market Opened: Jan 28, 2026, 11:23 AM ET
Resolver
0x2f5e3684c...A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources.
This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).
Resolver
0x2f5e3684c...Marty Jackley holds a commanding lead in the South Dakota at-large House race because the state has not elected a Democrat to Congress since 2008 and rates as solidly Republican across major forecasters. Jackley, the sitting attorney general, secured the GOP nomination in June 2026 with 79 percent of the primary vote and benefits from high statewide name recognition plus legislative accomplishments on public safety and transparency. Nikki Gronli, the Democratic nominee who ran unopposed in her primary, faces structural headwinds in a state where Republican candidates routinely win by wide margins. The November 3 general election occurs in an environment favoring the GOP nominee, though late shifts in turnout, candidate health, or major national events could still affect final results.
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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