Incumbent Rep. Dusty Johnson's retirement to pursue the governorship has opened South Dakota's at-large House seat, yet trader consensus heavily favors the Republican Party at 83% implied probability due to the district's R+14 Cook PVI and consistent lopsided victories—72% in 2024 alone. Recent Mason-Dixon polling from April 7–11 shows Attorney General Marty Jackley dominating the GOP primary with 68% support against James Bialota's 12%, bolstered by his $1 million cash on hand, Trump endorsement, and backing from withdrawn rival Casey Crabtree. Democrats, led by Nikki Gronli in their contested primary, trail at 6% amid historical weakness in the deep-red state. The June 2 primaries loom as the next catalyst, though forecasters rate the race Solid Republican.
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
SD-AL House Election Winner
$18,803 Vol.
$18,803 Vol.
Republican Party
89%
Democratic Party
6%
$18,803 Vol.
$18,803 Vol.
Republican Party
89%
Democratic Party
6%
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...Incumbent Rep. Dusty Johnson's retirement to pursue the governorship has opened South Dakota's at-large House seat, yet trader consensus heavily favors the Republican Party at 83% implied probability due to the district's R+14 Cook PVI and consistent lopsided victories—72% in 2024 alone. Recent Mason-Dixon polling from April 7–11 shows Attorney General Marty Jackley dominating the GOP primary with 68% support against James Bialota's 12%, bolstered by his $1 million cash on hand, Trump endorsement, and backing from withdrawn rival Casey Crabtree. Democrats, led by Nikki Gronli in their contested primary, trail at 6% amid historical weakness in the deep-red state. The June 2 primaries loom as the next catalyst, though forecasters rate the race Solid Republican.
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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