Iowa's four congressional districts feature multiple competitive races heading into the November 2026 midterms, with all seats currently held by Republicans. Forecasters rate IA-1 as a toss-up or lean Democratic in the rematch between incumbent Mariannette Miller-Meeks and Christina Bohannan, while IA-3 between Zach Nunn and Sarah Trone Garriott sits near toss-up status. The open IA-2 seat, vacated by Ashley Hinson's Senate bid, draws Democratic targeting and ratings ranging from lean Republican to toss-up. IA-4 remains solidly Republican. Midterm dynamics, polling trends showing narrow margins in the battlegrounds, and national conditions have shaped trader views that Democrats are most likely to secure two or three seats, with lower probabilities assigned to one or four.
Experimentelle KI-generierte Zusammenfassung mit Polymarket-Daten. Dies ist keine Handelsberatung und spielt keine Rolle bei der Auflösung dieses Marktes. · Aktualisiert3 41%
2 26%
1 22.1%
0 7.9%
0
8%
1
22%
2
26%
3
41%
4
10%
3 41%
2 26%
1 22.1%
0 7.9%
0
8%
1
22%
2
26%
3
41%
4
10%
All Iowa US House of Representatives elections held as part of the 2026 United States midterm election that elect voting members and determine representation in the upcoming 120th congress are included. Special elections to fill a vacancy for the remainder of an unexpired term are not included, whether or not held concurrently with the 2026 United States midterm election. Runoffs for qualifying elections will determine attribution of the relevant seat.
Seats are attributed to the party under which the member was elected. If a member-elect changes party affiliation or vacates their seat after the date of the 2026 United States midterm election, the seat is attributed to the party under which the member was elected.
Members of the House elected as independents who formally caucus, or who announce their intent to caucus, with a party prior to the date of the 2026 United States midterm election are included in that party’s count. If the caucus decisions of relevant members of the US House of Representatives elected as independents cannot be determined as of the date of the 2026 United States midterm election, this market may remain open until the earlier of (i) an announcement from the relevant members of their intents to caucus, or (ii) January 4th, 11:59 PM ET of the following calendar year. If no such announcement is made by January 4th, 11:59 PM ET of the following calendar year, the member will not count towards the seat count of any party.
The resolution sources for this market will be official information from relevant state electoral authorities, the United States Congress, and a consensus of credible reporting.
Markt eröffnet: Aug 11, 2026, 10:11 AM ET
Abwickler
0x69c47De9D...All Iowa US House of Representatives elections held as part of the 2026 United States midterm election that elect voting members and determine representation in the upcoming 120th congress are included. Special elections to fill a vacancy for the remainder of an unexpired term are not included, whether or not held concurrently with the 2026 United States midterm election. Runoffs for qualifying elections will determine attribution of the relevant seat.
Seats are attributed to the party under which the member was elected. If a member-elect changes party affiliation or vacates their seat after the date of the 2026 United States midterm election, the seat is attributed to the party under which the member was elected.
Members of the House elected as independents who formally caucus, or who announce their intent to caucus, with a party prior to the date of the 2026 United States midterm election are included in that party’s count. If the caucus decisions of relevant members of the US House of Representatives elected as independents cannot be determined as of the date of the 2026 United States midterm election, this market may remain open until the earlier of (i) an announcement from the relevant members of their intents to caucus, or (ii) January 4th, 11:59 PM ET of the following calendar year. If no such announcement is made by January 4th, 11:59 PM ET of the following calendar year, the member will not count towards the seat count of any party.
The resolution sources for this market will be official information from relevant state electoral authorities, the United States Congress, and a consensus of credible reporting.
Abwickler
0x69c47De9D...Iowa's four congressional districts feature multiple competitive races heading into the November 2026 midterms, with all seats currently held by Republicans. Forecasters rate IA-1 as a toss-up or lean Democratic in the rematch between incumbent Mariannette Miller-Meeks and Christina Bohannan, while IA-3 between Zach Nunn and Sarah Trone Garriott sits near toss-up status. The open IA-2 seat, vacated by Ashley Hinson's Senate bid, draws Democratic targeting and ratings ranging from lean Republican to toss-up. IA-4 remains solidly Republican. Midterm dynamics, polling trends showing narrow margins in the battlegrounds, and national conditions have shaped trader views that Democrats are most likely to secure two or three seats, with lower probabilities assigned to one or four.
Experimentelle KI-generierte Zusammenfassung mit Polymarket-Daten. Dies ist keine Handelsberatung und spielt keine Rolle bei der Auflösung dieses Marktes. · Aktualisiert



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