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All U.S. congressional districts, including the 4th Congressional District of Iowa, held elections in 2018.
Heading into the election the incumbent was Steve King (R), who was first elected to the 4th district in 2012. He previously served Iowa's 5th district before it was removed in the redistricting of 2012.
Iowa's 4th Congressional District covers north-central and northwest Iowa. The district includes Ames and Sioux City, as well as the counties of Lyon, Sioux, Plymouth, Woodbury, Monona, Harrison, Shelby, Crawford, Audubon, Carroll, Greene, Boone, Story, Hardin, Hamilton, Webster, Calhoun, Sac, Ida, Cherokee, Buena Vista, Pocahontas, Humboldt, Franklin, Butler, Chicksaw, Floyd, Cerro Gordo, Hancock, Winnebago, Kossuth, Emmet, Palo Alto, Dickinson, Osceola, O'Brien, Clay, Grundy and Wright.
The chart below contains data from financial reports submitted to the Federal Election Commission.
| Name | Party | Receipts* | Disbursements** | Cash on hand | Date |
|---|---|---|---|---|---|
| J.D. Scholten | Democratic Party | $3,313,720 | $3,238,277 | $75,444 | As of December 31, 2018 |
| Steve King | Republican Party | $876,230 | $976,612 | $26,221 | As of December 31, 2018 |
| Charles Aldrich | Libertarian Party | $0 | $0 | $0 | Data not available |
| Edward Peterson | Independent | $0 | $0 | $0 | Data not available |
|
Source: Federal Elections Commission, "Campaign finance data," 2018.
* According to the FEC, "Receipts are anything of value (money, goods, services or property) received by a political committee." |
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This section provides an overview of federal and state elections in Iowa from 2000 to 2016. All data comes from the Iowa Secretary of State website.
This chart shows the results of the presidential election in Iowa every year from 2000 to 2016.
Election results (President of the United States), Iowa 2000-2016
| Year | First-place candidate | First-place candidate votes (%) | Second-place candidate | Second-place candidate votes (%) | Margin of victory (%) |
|---|---|---|---|---|---|
| 2016 |  Donald Trump |
50.7% |  Hillary Clinton |
41.3% | 9.4% |
| 2012 | Barack Obama |
51.7% | Mitt Romney |
46.0% | 5.7% |
| 2008 | Barack Obama |
53.7% | John McCain |
44.2% | 9.5% |
| 2004 | George W. Bush |
49.9% | John Kerry |
49.2% | 0.7% |
| 2000 | Al Gore |
48.5% | George W. Bush |
48.2% | 0.3% |
This chart shows the results of U.S. Senate races in Iowa from 2000 to 2016. Every state has two Senate seats, and each seat goes up for election every six years. The terms of the seats are staggered so that roughly one-third of the seats are up every two years.
Election results (U.S. Senator), Iowa 2000-2016
| Year | First-place candidate | First-place candidate votes (%) | Second-place candidate | Second-place candidate votes (%) | Margin of victory (%) |
|---|---|---|---|---|---|
| 2016 | Chuck Grassley |
60.1% | Patty Judge |
35.7% | 24.4% |
| 2014 | Joni Ernst |
51.5% | Bruce Braley |
43.3% | 8.2% |
| 2010 | Chuck Grassley |
63.4% | Roxanne Conlin |
32.8% | 30.6% |
| 2008 | Tom Harkin |
61.4% | Christopher Reed |
36.5% | 24.9% |
| 2004 | Chuck Grassley |
70.2% | Arthur Small |
27.9% | 42.3% |
| 2002 | Tom Harkin |
54.2% | Greg Ganske |
43.8% | 10.4% |
This chart shows the results of the four gubernatorial elections held between 2000 and 2016. Gubernatorial elections are held every four years in Iowa.
Election results (Governor), Iowa 2000-2016
| Year | First-place candidate | First-place candidate votes (%) | Second-place candidate | Second-place candidate votes (%) | Margin of victory (%) |
|---|---|---|---|---|---|
| 2014 | Terry Branstad |
58.4% | Jack Hatch |
36.9% | 21.5% |
| 2010 | Terry Branstad |
52.3% | Chet Culver |
42.8% | 9.5% |
| 2006 | Chet Culver |
53.7% | Jim Nussle |
44.1% | 9.6% |
| 2002 | Tom Vilsack |
52.7% | Doug Gross |
44.5% | 8.2% |
This chart shows the number of Democrats and Republicans who were elected to represent Iowa in the U.S. House from 2000 to 2016. Elections for U.S. House seats are held every two years.
Congressional delegation, Iowa 2000-2016
| Year | Republicans | Republicans (%) | Democrats | Democrats (%) | Balance of power |
|---|---|---|---|---|---|
| 2016 | 3 |
75.0% | 1 |
25.0% | R+2 |
| 2014 | 3 |
75.0% | 1 |
25.0% | R+2 |
| 2012 | 2 |
50.0% | 2 |
50.0% | Split |
| 2010 | 2 |
40.0% | 3 |
60.0% | D+1 |
| 2008 | 2 |
40.0% | 3 |
60.0% | D+1 |
| 2006 | 2 |
40.0% | 3 |
60.0% | D+1 |
| 2004 | 4 |
80.0% | 1 |
20.0% | R+3 |
| 2002 | 4 |
80.0% | 1 |
20.0% | R+3 |
| 2000 | 4 |
80.0% | 1 |
20.0% | R+3 |
A state government trifecta occurs when one party controls both chambers of the state legislature and the governor's office.
Iowa Party Control: 1992-2019
Four years of Democratic trifectas • Five years of Republican trifectas
| Year | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Governor | R | R | R | R | R | R | R | D | D | D | D | D | D | D | D | D | D | D | D | R | R | R | R | R | R | R | R | R |
| Senate | D | D | D | D | D | R | R | R | R | R | R | R | R | S | S | D | D | D | D | D | D | D | D | D | D | R | R | R |
| House | D | R | R | R | R | R | R | R | R | R | R | R | R | R | R | D | D | D | D | R | R | R | R | R | R | R | R | R |
Demographic data for Iowa
| Iowa | U.S. | |
|---|---|---|
| Total population: | 3,121,997 | 316,515,021 |
| Land area (sq mi): | 55,857 | 3,531,905 |
| Gender | ||
| Female: | 50.4% | 50.8% |
| Race and ethnicity** | ||
| White: | 91.2% | 73.6% |
| Black/African American: | 3.2% | 12.6% |
| Asian: | 2% | 5.1% |
| Native American: | 0.3% | 0.8% |
| Pacific Islander: | 0.1% | 0.2% |
| Two or more: | 2% | 3% |
| Hispanic/Latino: | 5.4% | 17.1% |
| Education | ||
| High school graduation rate: | 91.5% | 86.7% |
| College graduation rate: | 26.7% | 29.8% |
| Income | ||
| Median household income: | $53,183 | $53,889 |
| Persons below poverty level: | 13.8% | 11.3% |
| Source: U.S. Census Bureau, "American Community Survey" (5-year estimates 2010-2015) for more information on the 2020 census and here for more on its impact on the redistricting process in Iowa. | ||
As of July 2016, Iowa's three largest cities were Des Moines (pop. est. 220,000), Cedar Rapids (pop. est. 130,000), and Davenport (pop. est. 100,000).
