South Dakota's at-large congressional seat is open following incumbent Dusty Johnson's unsuccessful 2026 gubernatorial primary bid. Republican nominee Marty Jackley secured the nomination with nearly 80 percent in the June primary, drawing on his prior service as state attorney general and strong name recognition across the state. The Democratic nominee, Nikki Gronli, faces an electorate where Republicans have held the seat continuously since 2008 amid consistent statewide partisan advantages. Trader consensus at 93.5 percent for the Republican outcome reflects these structural factors and the absence of competitive polling or fundraising signals for Democrats. A major scandal, health event, or unusually strong national Democratic performance could narrow the margin, though such shifts remain historically rare in this district.
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
$28,718 Vol.
$28,718 Vol.
Republican Party
94%
Democratic Party
4%
$28,718 Vol.
$28,718 Vol.
Republican Party
94%
Democratic Party
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...South Dakota's at-large congressional seat is open following incumbent Dusty Johnson's unsuccessful 2026 gubernatorial primary bid. Republican nominee Marty Jackley secured the nomination with nearly 80 percent in the June primary, drawing on his prior service as state attorney general and strong name recognition across the state. The Democratic nominee, Nikki Gronli, faces an electorate where Republicans have held the seat continuously since 2008 amid consistent statewide partisan advantages. Trader consensus at 93.5 percent for the Republican outcome reflects these structural factors and the absence of competitive polling or fundraising signals for Democrats. A major scandal, health event, or unusually strong national Democratic performance could narrow the margin, though such shifts remain historically rare in this district.
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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