Fundraising
- Sarah Trone Garriott Das of Oct 14, 2026Raised $8.1mSpent $6.9m · Cash $1.2m
- Zach Nunn Ras of Oct 14, 2026Raised $6.1mSpent $5.6m · Cash $621k
1 other 2026 candidate filed reports (primary candidate). 3 other candidates have not filed.
Federal Election Commission, candidate totals, public domain.
President in this district
PollCheck calculation from precinct returns on the 2026 lines (method).
| Year | Democrat | Republican | Other | Margin |
|---|---|---|---|---|
| 2024 | Harris 47.1% | Trump 51.6% | 1.3% | R+4.4 |
| 2020 | Biden 48.8% | Trump 49.2% | 2.0% | R+0.3 |
| 2016 | Clinton 44.8% | Trump 47.8% | 7.4% | R+3.0 |
Who lives here
| Measure | This district | US |
|---|---|---|
| People | ||
| Population | 816,359 | |
| Adults (18+) | 617,383 | |
| Citizens, % of adults | 94.9% | 92.1% |
| Age, % of adults | ||
| 18 to 29 | 20.2% | 20.3% |
| 30 to 44 | 27.7% | 25.9% |
| 45 to 64 | 31.4% | 31.8% |
| 65 and over | 20.7% | 22.0% |
| Race and Hispanic origin, % of residents | ||
| White | 78.2% | 57.4% |
| Black | 5.2% | 11.9% |
| Hispanic | 8.7% | 19.3% |
| Asian | 3.9% | 5.9% |
| Other or more than one | 4.1% | 5.5% |
| Education and income | ||
| Bachelor's degree or higher, % of 25+ | 36.7% | 35.7% |
| Median household income | $80,844 | $80,734 |
American Community Survey 2020-2024 5-year estimates for this district. The tick marks the US figure.
Winning margin
Results since 1976
| Year | Winner | Share | Runner-up | Share | Margin |
|---|---|---|---|---|---|
| Current lines (2022 on) post-census redistricting | |||||
| 2024 | Zachary Nunn Republican | 51.8% | Lanon Baccam Democrat others 0.3% | 47.9% | R+3.8 |
| 2022 | Zach Nunn Republican | 50.3% | Cynthia Axne Democrat others 0.2% | 49.6% | R+0.7 |
| Earlier lines, elections 2012-2020 seat count changed from 5 to 4 after the census | |||||
| 2020 | Cynthia Axne Democrat | 48.9% | David Young Republican others 3.5% | 47.5% | D+1.4 |
| 2018 | Cindy Axne Democrat | 49.3% | David Young Republican others 3.6% | 47.1% | D+2.2 |
| 2016 | David Young Republican | 53.5% | Jim Mowrer Democrat others 6.8% | 39.7% | R+13.7 |
| 2014 | David Young Republican | 52.8% | Staci Appel Democrat others 5.0% | 42.2% | R+10.5 |
| 2012 | Tom Latham Republican | 52.2% | Leonard L. Boswell Democrat others 4.2% | 43.6% | R+8.6 |
| Earlier lines, elections 2002-2010 post-census redistricting | |||||
| 2010 | Leonard L. Boswell Democrat | 50.7% | Brad Zaun Republican others 2.8% | 46.5% | D+4.2 |
| 2008 | Leonard L. Boswell Democrat | 56.4% | Kim Schmett Republican others 1.5% | 42.1% | D+14.3 |
| 2006 | Leonard L. Boswell Democrat | 51.9% | Jeff Lamberti Republican others 1.6% | 46.5% | D+5.4 |
| 2004 | Leonard L. Boswell Democrat | 55.2% | Stan Thompson Republican others 0.1% | 44.7% | D+10.5 |
| 2002 | Leonard L. Boswell Democrat | 53.4% | Stan Thompson Republican others 1.5% | 45.0% | D+8.4 |
| Earlier lines, elections 1992-2000 seat count changed from 6 to 5 after the census | |||||
| 2000 | Leonard L. Boswell Democrat | 62.8% | Jay Marcus Republican others 3.5% | 33.7% | D+29.1 |
| 1998 | Leonard L. Boswell Democrat | 56.9% | Larry McKibben Republican others 2.0% | 41.1% | D+15.8 |
| 1996 | Leonard L. Boswell Democrat | 49.4% | Mike Mahaffey Republican others 3.0% | 47.6% | D+1.7 |
| 1994 | Jim Lightfoot Republican | 57.8% | Elaine Baxter Democrat others 1.2% | 41.0% | R+16.8 |
| 1992 | Jim Lightfoot Republican | 49.0% | Elaine Baxter Democrat others 4.0% | 47.1% | R+1.9 |
| Earlier lines, elections 1982-1990 post-census redistricting | |||||
| 1990 | David R. Nagle Democrat | 99.2% | others 0.8% | D+98.4 | |
| 1988 | David R. Nagle Democrat | 63.4% | Donald B. Redfern Republican | 36.6% | D+26.7 |
| 1986 | David R. Nagle Democrat | 54.6% | John McIntee Republican | 45.4% | D+9.2 |
| 1984 | Cooper Evans Republican | 60.7% | Joe Johnston Democrat | 39.3% | R+21.4 |
| 1982 | Cooper Evans Republican | 55.5% | Lynn G. Cutler Democrat | 44.5% | R+10.9 |
| Earlier lines, elections 1976-1980 | |||||
| 1980 | Cooper Evans Republican | 51.4% | Lynne G. Cutler Democrat others 0.2% | 48.5% | R+2.9 |
| 1978 | Charles E. Grassley Republican | 74.8% | John Knudson Democrat | 25.2% | R+49.6 |
| 1976 | Charles E. Grassley Republican | 56.5% | Stephen J. Rapp Democrat | 43.5% | R+12.9 |
More on Iowa
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About these results
Shares count all candidate votes, including write-ins, with a candidate's votes on several party lines added together. Each result is on the lines in force at the time. Mid-decade redraws before 2016 may be unmarked.
President in this district: 2016 and 2020 are estimates: precinct votes are split between districts by census block.
Counties only partly inside the district show the 2024 result for that part; estimates are labelled.
Margin chart: winner minus runner-up. Gaps are unopposed races; dashed lines are new district lines.
Sources
Results: MIT Election Data and Science Lab, U.S. House 1976-2016 (doi:10.7910/DVN/IG0UN2, CC0; via MEDSL/constituency-returns), and Clerk of the US House, Statistics of the Presidential and Congressional Election 2018-2024 (public domain).
Presidential results: PollCheck calculation from MIT Election Data and Science Lab 2024 precinct returns (doi:10.7910/DVN/XDJYKC, doi:10.7910/DVN/USBYR4, CC0; state totals doi:10.7910/DVN/42MVDX, CC0) and Voting and Election Science Team 2016 and 2020 precinct results and shapes (doi:10.7910/DVN/NH5S2I, doi:10.7910/DVN/K7760H, CC BY 4.0), with US Census Bureau 2020 block populations and block equivalency files (public domain). Official figures: Texas Legislative Council (2024 on the 2026 lines); Louisiana, New Jersey, California and Washington election offices (county totals). Certified results transcribed by Wikipedia (CC BY-SA 4.0): Maine 2024 by district: 2024 United States presidential election in Maine (revision 1382530995); Indiana county totals: 2024 United States presidential election in Indiana (revision 1382505975); Oregon county totals: 2024 United States presidential election in Oregon (revision 1382605746).
District lines: US Census Bureau TIGER/Line 2026 (120th Congress) and 2025 cartographic boundary files (119th Congress), public domain.
Members: unitedstates/congress-legislators (CC0).
Counties: US Census Bureau 2024 cartographic boundary file (public domain); 2024 county results summed from the same MEDSL precinct returns, with the official county totals above.
Demographics: US Census Bureau, American Community Survey 5-year estimates 2020-2024 (public domain).
2028 candidates: Federal Election Commission (public domain).
Photos: official portraits, public domain (US government); see Photo credits.
PollCheck US. Data through November 5, 2026. Photo credits