# Iowa's 4th District margin of victory

Iowa's 4th District

Updated: May 8, 2026

Category: Elections

Tags: US Elections

HTML: /markets/elections/us-elections/iowa-s-4th-district-margin-of-victory/

## Short Answer

**Key takeaway.** Both the **model** and the **market** expect Republicans to win Iowa's 4th District by 12+ points, with no compelling evidence of mispricing.

## Key Claims (January 2026)

**- - District's PVI of R+15/R+16 indicates a strong Republican lean.** - Historical Republican victory margins consistently exceed 25 points.
- Leading analysts rate the district as Solid or Safe Republican.
- GOP nominee Chris McGowan holds a significant financial advantage.
- Unopposed primary status expected to have limited general election impact.
- National or Iowa issues may realistically narrow the victory margin.

### Why This Matters (GEO)

- AI agents extract claims, not arguments.
- Improves citation probability in summaries and answer cards.
- Enables fact stitching across multiple sources.

## Executive Verdict

**Key takeaway.** Octagon's **94.7%** implies a +**2.1%** gap over 93c **market**, suggesting a 1.1x payout for a large Republican victory margin.

### Who Wins and Why

| Outcome | Market | Model | Why |
| --- | --- | --- | --- |
| Republicans, 30+ pts | 31.0% | 35.0% | Strong historical Republican margins (34-37 points) and an unopposed GOP nominee suggest a large victory. |
| Republicans, 12+ pts | 92.6% | 94.7% | Strong historical Republican margins (34-37 points) and an unopposed GOP nominee suggest a large victory. |
| Republicans, 33+ pts | 21.0% | 30.9% | Strong historical Republican margins (34-37 points) and an unopposed GOP nominee suggest a large victory. |

## Model vs Market

| Outcome | Market Probability | Octagon Model Probability |
| --- | --- | --- |
| Republicans, 30+ pts | 31.0% | 35.0% |
| Republicans, 12+ pts | 92.6% | 94.7% |
| Republicans, 33+ pts | 21.0% | 30.9% |
| Republicans, 15+ pts | 0.0% | 43.9% |
| Republicans, 18+ pts | 0.0% | 43.5% |
| Republicans, 21+ pts | 0.0% | 43.0% |
| Republicans, 24+ pts | 0.0% | 41.0% |
| Republicans, 27+ pts | 0.0% | 38.0% |
| Republicans, 36+ pts | 0.0% | 15.0% |

- Expiration: November 3, 2027

## Market Behavior & Price Dynamics

This prediction market experienced a single, decisive price movement, jumping from a starting price of 1.0% to its current level of 92.6%. The chart shows a flat line at a very low probability, followed by a near-vertical spike to a very high probability, where it has remained. This indicates the market priced in a near-certain outcome almost instantaneously. The total volume of 707 traded contracts suggests a moderate level of activity over the life of the market, though the price appears to have settled quickly once new information became available.

The dramatic price surge directly reflects the market reacting to the definitive results of the 2024 election in Iowa's 4th District. The provided context indicates that Republican Randy Feenstra secured a victory with a commanding 34.4 point margin over his opponent. The immediate and sharp rise to 92.6% suggests that this result fulfilled the "YES" condition for the market. The lack of significant price fluctuation after this spike demonstrates a strong market consensus, with traders confident that the outcome was settled.

The chart establishes a clear support level at the initial price of 1.0% and a very strong resistance, or ceiling, at the current 92.6% level, which appears to be the market's settlement point. The price action reflects a shift from initial uncertainty to overwhelming confidence. The market sentiment is unambiguously bullish on a "YES" resolution, aligning with the reported election results that show a large Republican margin of victory in this district, which is classified as "Safe Republican".

## Contract Snapshot

This market resolves to "Yes" if the Republican Party wins the 2026 U.S. House of Representatives election in Iowa's 4th District by 24 percentage points or more; otherwise, it resolves to "No". The margin of victory is calculated as the Republican Party's vote percentage minus the closest opposing candidate's vote percentage, with no rounding applied, and is verified by the official election authority. The market closes early if certified election results are published, or by November 3, 2027, at the latest.

## Market Discussion

Iowa's 4th District is considered a safe Republican seat with an R+16 Cook PVI, where the Republican candidate secured a 34.4-point victory margin in 2024 [[^]](https://www.washingtonpost.com/elections/results/2024/11/05/iowa-house-district-4/)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2024)[[^]](https://www.kitsapsun.com/elections/results/2024-11-05/race/17074/iowa). Prediction markets reflect strong confidence in a Republican win, with Polymarket showing a 90% probability for the GOP to win the IA-04 House seat in 2026 and Kalshi offering an option for a 24+ point Republican margin of victory; there is limited public discussion beyond acknowledging the incumbent's dominance [[^]](https://base.polymarket.com/event/ia-04-house-election-winner)[[^]](https://kalshi.com/markets/kxmidtermmov/kxmidtermmov-ia04r)[[^]](https://www.facebook.com/adamsteenforgovernor/posts/congressman-feenstra-continually-demonstrates-how-dc-has-disconnected-him-from-i/122150314400980831/).

## Market Data

| Contract | Yes Bid | Yes Ask | Last Price | Volume | Open Interest |
| --- | --- | --- | --- | --- | --- |
| Republicans, 12+ pts | 92.5% | 92.6% | 92.6% | $707 | $357 |
| Republicans, 15+ pts | 80% | 81% | 0% | $0 | $0 |
| Republicans, 18+ pts | 69% | 70% | 0% | $0 | $0 |
| Republicans, 21+ pts | 56% | 57% | 0% | $0 | $0 |
| Republicans, 24+ pts | 47% | 48% | 0% | $0 | $0 |
| Republicans, 27+ pts | 36% | 37% | 0% | $0 | $0 |
| Republicans, 30+ pts | 30% | 31% | 31% | $808 | $358 |
| Republicans, 33+ pts | 20% | 21% | 21% | $162 | $162 |
| Republicans, 36+ pts | 13% | 14% | 0% | $0 | $0 |

## What historical election results and demographic trends in Iowa's 4th District since 2022 support a Republican victory margin of over 25 points in 2026?

2022 Congressional Victory Margin | 37 points (Randy Feenstra, 67.4% to 30.4%) [[^]](https://www.jsonline.com/elections/results/race/2022-11-08-house-IA-17074/)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2022) |
2024 Congressional Victory Margin | 34.4 points (Randy Feenstra, 67.0-67.2% to 32.8%) [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2024)[[^]](https://www.washingtonpost.com/elections/results/2024/11/05/iowa-house-district-4/) |
District Cook PVI | R+16 [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2022)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2024)[[^]](https://psephology.org/d/IA04) |

**Iowa's 4th District consistently delivers large Republican victory margins**

Iowa's 4th District consistently delivers large Republican victory margins. Recent election outcomes underscore this trend, with Republican Randy Feenstra securing significant wins against Democrat Ryan Melton. In 2022, Feenstra won by a 37-point margin, capturing **67.4%** of the vote compared to Melton's **30.4%** [[^]](https://www.jsonline.com/elections/results/race/2022-11-08-house-IA-17074/)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2022). He replicated this strong performance in 2024, defeating Melton by 34.4 points, with his vote share ranging from 67.0-**67.2%** against Melton's **32.8%** [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2024)[[^]](https://www.washingtonpost.com/elections/results/2024/11/05/iowa-house-district-4/).

The district's strong Republican lean is supported by its demographics. Its inherent Republican advantage is quantified by a Cook Partisan Voting Index (PVI) of R+16 [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2022)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2024)[[^]](https://psephology.org/d/IA04). This lean was evident in the 2020 presidential election, where Republicans led by 27 points, receiving **62.7%** of the vote while Democrats secured **35.7%** [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2022)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2024)[[^]](https://psephology.org/d/IA04). Demographically, the district is predominantly White at **82.6%**, and approximately **49%** rural. It also features a median income of **$73,000,** a high homeownership rate of **72%**, and a notable evangelical voter base [[^]](https://psephology.org/d/IA04)[[^]](https://reference.org/facts/Iowa%27s_4th_congressional_district/rxjEfF2q)[[^]](https://datausa.io/profile/geo/congressional-district-4-ia)[[^]](https://en.wikipedia.org/wiki/Iowa's_4th_congressional_district).

Future projections reinforce the district's status as a Republican stronghold. Analyses confirm no evidence of adverse voter trends are occurring between 2022 and 2026, bolstering the district's position. This outlook supports projections for a Republican victory margin exceeding 25 points in 2026, as noted by a Cook Political Report 2026 analysis [[^]](https://www.cookpolitical.com/house/race/483101).

## How might the outcome of the June 2, 2026 Republican primary, particularly Chris McGowan's performance, impact the final margin against the Democratic nominee?

Iowa 4th District Cook PVI | R+15 [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026)[[^]](https://www.cookpolitical.com/house/race/483101) |
GOP Win Probability | 90% [[^]](https://base.polymarket.com/event/ia-04-house-election-winner) |
Previous Republican Win | 67% (Feenstra) [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026)[[^]](https://www.cookpolitical.com/house/race/483101) |

**Chris McGowan's unopposed primary status is expected to have limited general election impact**

Chris McGowan's unopposed primary status is expected to have limited general election impact. McGowan became the sole Republican nominee in Iowa's 4th Congressional District's June 2, 2026 primary after other candidates withdrew and endorsed him, also receiving an endorsement from Trump [[^]](https://www.nwestiowa.com/nwest_iowa_review/mcgowan-lone-republican-left-in-iowas-4th-congressional-district/article_b11c2fb7-cb85-4678-bc7a-dbb9eae3abcd.html)[[^]](https://ballotpedia.org/Chris_McGowan)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026_(June_2_Republican_primary)). This lack of direct contestation in the primary inherently reduces its influence on the final general election margin against the Democratic nominee.

McGowan's primary vote share, however, could signal Republican base engagement. Despite being unopposed, his vote total could indicate voter enthusiasm [[^]](https://www.nwestiowa.com/nwest_iowa_review/mcgowan-lone-republican-left-in-iowas-4th-congressional-district/article_b11c2fb7-cb85-4678-bc7a-dbb9eae3abcd.html)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026_(June_2_Republican_primary)). A weak performance, such as receiving less than **80%** of the vote if write-ins occur, might suggest voter disengagement and could slightly narrow the general election margin [[^]](https://www.nwestiowa.com/nwest_iowa_review/mcgowan-lone-republican-left-in-iowas-4th-congressional-district/article_b11c2fb7-cb85-4678-bc7a-dbb9eae3abcd.html)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026_(June_2_Republican_primary)). Conversely, a strong showing with over **95%** of the vote would affirm the solidity of the Republican base [[^]](https://www.nwestiowa.com/nwest_iowa_review/mcgowan-lone-republican-left-in-iowas-4th-congressional-district/article_b11c2fb7-cb85-4678-bc7a-dbb9eae3abcd.html)[[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026_(June_2_Republican_primary)).

The district's strong Republican lean limits the overall primary outcome's influence. Iowa's 4th Congressional District is rated Solid Republican with a Cook PVI of R+15, and prediction markets indicate a **90%** GOP win **probability** for the general election [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026)[[^]](https://www.cookpolitical.com/house/race/483101)[[^]](https://base.polymarket.com/event/ia-04-house-election-winner). Historically, the incumbent won **67%** in the district [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026)[[^]](https://www.cookpolitical.com/house/race/483101). The Democratic primary on June 2, 2026, will feature Dave Dawson, Stephanie Steiner, and Ashley WolfTornabane [[^]](https://ballotpedia.org/Iowa's_4th_Congressional_District_election,_2026_(June_2_Democratic_primary)).

## How does the 2026 fundraising and cash-on-hand for Chris McGowan (R) compare to that of the leading Democratic candidate, and how does this financial gap correlate with past IA-04 victory margins?

Chris McGowan (R) Cash-on-hand | $354K (February 2026 filings [[^]](https://siouxcityjournal.com/article_a7bcf716-a1aa-5455-a4c2-4242ab481d23.html)[[^]](https://www.quiverquant.com/election-fundraising/house/IA/4)[[^]](https://www.yahoo.com/news/articles/latest-fec-reports-ia-4th-111953891.html)) |
Dave Dawson (D) Cash-on-hand | $30K (February 2026 filings [[^]](https://www.kwit.org/podcast/spm-news/2026-02-03/mcgowan-of-sioux-city-leads-all-iowa-4th-congressional-district-candidates-in-fundraising)[[^]](https://www.yahoo.com/news/articles/latest-fec-reports-ia-4th-111953891.html)[[^]](https://docquery.fec.gov/cgi-bin/forms/C00917369/1936825/)) |
IA-04 Republican Victory Margins | 24-37 points (2020, 2022, 2024 elections [[^]](https://ballotpedia.org/Iowa's_4th_Congressional_District_election,_2024)[[^]](https://en.wikipedia.org/wiki/Iowa's_4th_congressional_district)[[^]](https://www.kitsapsun.com/elections/results/2024-11-05/race/17074/iowa)[[^]](https://www.rightdatausa.com/election_results?d=04&s=IA&t=H&y=2024)) |

**Chris McGowan holds a significant financial lead over Dave Dawson in IA-04**

Chris McGowan holds a significant financial lead over Dave Dawson in IA-04. As of February 2026 filings, Republican Chris McGowan reported a substantial financial advantage over leading Democratic candidate Dave Dawson in Iowa's 4th Congressional District. McGowan raised **$136,000** in Q4 2025, bringing his total fundraising to approximately **$508,000** and accumulating **$354,000** cash-on-hand [[^]](https://siouxcityjournal.com/article_a7bcf716-a1aa-5455-a4c2-4242ab481d23.html)[[^]](https://www.quiverquant.com/election-fundraising/house/IA/4)[[^]](https://www.yahoo.com/news/articles/latest-fec-reports-ia-4th-111953891.html). In contrast, Dave Dawson's total fundraising reached around **$55,000,** with approximately **$30,000** cash-on-hand, illustrating a considerable financial disparity between the two campaigns [[^]](https://www.kwit.org/podcast/spm-news/2026-02-03/mcgowan-of-sioux-city-leads-all-iowa-4th-congressional-district-candidates-in-fundraising)[[^]](https://www.yahoo.com/news/articles/latest-fec-reports-ia-4th-111953891.html)[[^]](https://docquery.fec.gov/cgi-bin/forms/C00917369/1936825/).

This financial gap reflects Iowa's 4th District's consistent Republican dominance. The observed financial disparity correlates with the historical Republican strength in IA-04, a district rated as Solid R. Previous election cycles demonstrate significant Republican victory margins, including 24 points (62-**38%**) in 2020, 37 points (67-**30%**) in 2022, and 34 points (67-**33%**) in 2024 [[^]](https://ballotpedia.org/Iowa's_4th_Congressional_District_election,_2024)[[^]](https://en.wikipedia.org/wiki/Iowa's_4th_congressional_district)[[^]](https://www.kitsapsun.com/elections/results/2024-11-05/race/17074/iowa)[[^]](https://www.rightdatausa.com/election_results?d=04&s=IA&t=H&y=2024). Furthermore, past spending patterns show Republicans outspending Democrats substantially, with GOP expenditures totaling **$2.13** million compared to **$0.15** million for Democrats [[^]](https://www.quiverquant.com/election-fundraising/house/IA/4). This electoral landscape is further supported by January 2026 Polymarket predictions, which indicate a **90%** chance of a Republican winner [[^]](https://www.quiverquant.com/election-fundraising/house/IA/4)[[^]](https://base.polymarket.com/event/ia-04-house-election-winner).

## Where can traders find reliable, regularly updated fundraising reports and any available district-level polling for the 2026 Iowa 4th District congressional race?

Chris McGowan Raised | $508k (February 2026) [[^]](https://www.yahoo.com/news/articles/latest-fec-reports-ia-4th-111953891.html) |
Ryan Rhodes Raised | $314k (February 2026) [[^]](https://www.yahoo.com/news/articles/latest-fec-reports-ia-4th-111953891.html) |
Christian Schlaefer Polling Lead | 31.1% (February 2026) [[^]](https://theiowastandard.com/grassroots-campaign-of-christian-schlaefer-shows-very-strong-early-performance-in-fourth-district-leads-caucus-polling/) |

**The FEC provides regularly updated fundraising reports for the 2026 Iowa 4th District race**

The FEC provides regularly updated fundraising reports for the 2026 Iowa 4th District race. The Federal Election Commission's primary page serves as the reliable and regularly updated source for all campaign fundraising reports [[^]](https://www.fec.gov/data/elections/house/IA/04/2026/). As of February 2026, the latest filings show Republican candidate Chris McGowan having raised **$508,000,** with **$354,000** cash-on-hand. Another Republican, Ryan Rhodes, reported **$314,000** raised and **$204,000** cash-on-hand. Democratic candidate Dave Dawson's reports indicated **$55,000** raised and **$30,000** cash-on-hand during the same period [[^]](https://www.yahoo.com/news/articles/latest-fec-reports-ia-4th-111953891.html).

Early polling data offers limited insight into the 2026 Iowa 4th District race. For district-level polling, an early IA-04 caucus poll conducted in February 2026 indicated Christian Schlaefer leading at **31.1%** across nine counties [[^]](https://theiowastandard.com/grassroots-campaign-of-christian-schlaefer-shows-very-strong-early-performance-in-fourth-district-leads-caucus-polling/). However, a general, regularly updated source for district-level polling beyond this specific report has not been identified [[^]](https://theiowastandard.com/grassroots-campaign-of-christian-schlaefer-shows-very-strong-early-performance-in-fourth-district-leads-caucus-polling/).

## What national political trends or specific Iowa-based issues, such as agricultural policy, could realistically narrow the Republican margin of victory in IA-04 before November 2026?

IA-04 2024 Trump Victory Margin | 65-34% [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026_(June_2_Republican_primary))[[^]](https://en.wikipedia.org/wiki/Iowa's_4th_congressional_district) |
IA-04 2024 Feenstra Victory Margin | 67% [[^]](https://en.wikipedia.org/wiki/Iowa's_4th_congressional_district)[[^]](https://www.cookpolitical.com/house/race/483101) |
Apr 2026 Gubernatorial Poll | Sand (D) 51% vs Feenstra (R) 39% [[^]](https://cbs2iowa.com/news/local/poll-sand-leads-feenstra-democratic-senate-candidates-lead-hinson) |

**The Republican margin of victory in Iowa's 4th congressional district (IA-04) may realistically narrow**

The Republican margin of victory in Iowa's 4th congressional district (IA-04) may realistically narrow. This is despite its strong Republican lean, where former President Trump won 65-**34%** in 2024 and Representative Feenstra secured **67%** of the vote in 2024 [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026_(June_2_Republican_primary))[[^]](https://en.wikipedia.org/wiki/Iowa's_4th_congressional_district)[[^]](https://www.cookpolitical.com/house/race/483101). This potential shift is influenced by the fact that the seat is now open, as Feenstra is running for governor, and by broader national political trends [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026_(June_2_Republican_primary))[[^]](https://en.wikipedia.org/wiki/Iowa's_4th_congressional_district)[[^]](https://www.cookpolitical.com/house/race/483101)[[^]](https://www.nbcnews.com/politics/2026-election/republicans-fret-iowa-tough-midterm-races-senate-governor-house-rcna343046)[[^]](https://civileats.com/2026/02/24/how-farmer-concerns-are-shifting-iowas-political-landscape/).

National political trends indicate statewide challenges for Iowa Republicans. Reports suggest concern over developing tough midterm races for Senate, governor, and House seats across the state [[^]](https://www.nbcnews.com/politics/2026-election/republicans-fret-iowa-tough-midterm-races-senate-governor-house-rcna343046). A contributing factor is former President Trump's low approval, alongside a statewide poll in April 2026 showing Democratic candidate Rob Sand leading Republican Feenstra **51%** to **39%** for governor [[^]](https://cbs2iowa.com/news/local/poll-sand-leads-feenstra-democratic-senate-candidates-lead-hinson)[[^]](https://www.nbcnews.com/politics/2026-election/republicans-fret-iowa-tough-midterm-races-senate-governor-house-rcna343046). Furthermore, the generic ballot statewide is near a tie, and Democrats currently hold a lead among independents [[^]](https://laurabelin.substack.com/p/new-poll-candidates-spar-in-governor).

Iowa-based agricultural issues could significantly narrow the Republican margin. These specific concerns include tariffs impacting soybeans, corporate consolidation within the agricultural sector, nitrate pollution, and foreign land purchases [[^]](https://www.thegazette.com/news/elections/zach-wahls-unveils-iowa-farm-policy-plan-in-competitive-u-s-senate-race/article_524e4b98-b493-483c-9e5a-ccb6f640fb6b.html)[[^]](https://civileats.com/2026/02/24/how-farmer-concerns-are-shifting-iowas-political-landscape/)[[^]](https://www.iowapublicradio.org/news-from-npr/2026-05-02/2026-senate-races-to-watch-from-most-likely-to-flip-to-democratic-long-shots). The presence of Stephanie Steiner, a small-farm owner and Democratic primary candidate, further highlights the relevance of these agricultural concerns to the district's political landscape [[^]](https://ballotpedia.org/Stephanie_Steiner).

## What Could Change the Odds

**Iowa's 4th Congressional District (IA-04) is currently rated as Solid Republican by Cook and Inside Elections as of May 5, 2026, and Safe Republican by Sabato's Crystal Ball [[^]](https://ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026)[[^]](https://www.cookpolitical.com/house/race/483101)[[^]](https://www.ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026).** Prediction markets like Polymarket show the GOP with a **90%** **probability** and the Democrats with a **9%** **probability** of winning IA-04 [[^]](https://base.polymarket.com/event/ia-04-house-election-winner)[[^]](https://worldcoin.polymarket.com/event/ia-04-house-election-winner). The district has a PVI of R+15, and the incumbent won the last general election by **67%** in the prior cycle [[^]](https://www.cookpolitical.com/house/race/483101)[[^]](https://www.ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026).

**The most significant catalyst for potential change in this race is that IA-04 will be an open seat, as the incumbent is running for Iowa governor in the June 2, 2026 GOP primary [[^]](https://www.cookpolitical.com/analysis/house/iowa-house/2026-iowa-house-analysis-parties-prepare-two-barnburner-races)[[^]](https://en.wikipedia.org/wiki/Randy_Feenstra)[[^]](http://www.ballotpedia.org/Randy_Feenstra).** The Republican primary for this open seat includes candidates such as Chris McGowan, who is noted as the fundraising leader, alongside Ryan Rhodes and Christian Schlaefer [[^]](https://www.ballotpedia.org/Iowa%27s_4th_Congressional_District_election,_2026_(June_2_Republican_primary))[[^]](https://eu.registerguard.com/story/news/politics/elections/2025/12/30/iowa-4th-congressional-district-democratic-primary-election-2026/87778676007/).

**Despite the open seat, no specific bullish or bearish catalysts have been identified that would significantly alter the district's lean, which remains safely Republican due to its geography and a voter registration advantage where Republicans outnumber Democrats by more than 2-to-1 [[^]](https://eu.registerguard.com/story/news/politics/elections/2025/12/30/iowa-4th-congressional-district-democratic-primary-election-2026/87778676007/).** Kalshi markets reflect expectations for a Republican victory with a margin including 24+ points [[^]](https://kalshi.com/markets/kxmidtermmov/kxmidtermmov-ia04r)[[^]](https://kalshi.com/markets/kxmidtermmov/midterm-margin-of-victory/kxmidtermmov-ia04r).

## Key Dates & Catalysts

- **Expiration:** November 03, 2027
- **Closes:** November 03, 2027

## Decision-Flipping Events

- Iowa's 4th Congressional District (IA-04) is currently rated as Solid Republican by Cook and Inside Elections as of May 5, 2026, and Safe Republican by Sabato's Crystal Ball [^] [^] [^] .
- Prediction markets like Polymarket show the GOP with a **90%** **probability** and the Democrats with a **9%** **probability** of winning IA-04 [^] [^] .
- The district has a PVI of R+15, and the incumbent won the last general election by **67%** in the prior cycle [^] [^] .
- The most significant catalyst for potential change in this race is that IA-04 will be an open seat, as the incumbent is running for Iowa governor in the June 2, 2026 GOP primary [^] [^] [^] .

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## Historical Resolutions

No historical resolution data available for this series.

## Disclaimer

This content is for informational and educational purposes only and does not constitute financial, investment, legal, or trading advice.
Prediction markets involve risk of loss. Past performance does not guarantee future results.
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