**The competitive IA-03 contest features Republican incumbent Zach Nunn seeking a third term against Democratic state Sen. Sarah Trone Garriott, who secured her party's nomination in the June 2, 2026 primary.** The district, anchored in the Des Moines metro area with an R+2 partisan voting index, saw Nunn win reelection by roughly four points in 2024. Forecasters rate the seat a toss-up or lean Republican, reflecting its status as one of the closer House races in the 2026 midterms. Trader consensus favoring the Democratic nominee aligns with historical midterm patterns pressuring the president's party, internal surveys showing Trone Garriott ahead, and unified Democratic support following the primary. A Libertarian candidate has also entered, though the outcome will hinge on turnout, economic conditions, and campaign spending through November.
Riepilogo sperimentale generato dall'AI con riferimento ai dati di Polymarket. Questo non è un consiglio di trading e non ha alcun ruolo nella risoluzione di questo mercato. · AggiornatoIA-03 House Election Winner
Democratic Party
71%
Republican Party
37%
Democratic Party
71%
Republican Party
37%
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/).
Mercato aperto: Dec 16, 2025, 11:59 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...**The competitive IA-03 contest features Republican incumbent Zach Nunn seeking a third term against Democratic state Sen. Sarah Trone Garriott, who secured her party's nomination in the June 2, 2026 primary.** The district, anchored in the Des Moines metro area with an R+2 partisan voting index, saw Nunn win reelection by roughly four points in 2024. Forecasters rate the seat a toss-up or lean Republican, reflecting its status as one of the closer House races in the 2026 midterms. Trader consensus favoring the Democratic nominee aligns with historical midterm patterns pressuring the president's party, internal surveys showing Trone Garriott ahead, and unified Democratic support following the primary. A Libertarian candidate has also entered, though the outcome will hinge on turnout, economic conditions, and campaign spending through November.
Riepilogo sperimentale generato dall'AI con riferimento ai dati di Polymarket. Questo non è un consiglio di trading e non ha alcun ruolo nella risoluzione di questo mercato. · Aggiornato
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