2020 United States presidential election in Iowa

The 2020 United States presidential election in Iowa was held on Tuesday, November 3, 2020, as part of the 2020 United States elections in which all 50 states plus the District of Columbia participated.[1] Iowa voters chose electors to represent them in the Electoral College via a popular vote, pitting the Republican Party's nominee, incumbent President Donald Trump, and running mate Vice President Mike Pence against Democratic Party nominee, former Vice President Joe Biden, and his running mate California Senator Kamala Harris. Iowa has six electoral votes in the Electoral College.[2]

Main article: 2020 United States presidential election
2020 United States presidential election in Iowa
November 3, 2020
Turnout75.77%
 
Nominee Donald Trump Joe Biden
Party Republican Democratic
Home state Florida Delaware
Running mate Mike Pence Kamala Harris
Electoral vote 6 0
Popular vote 897,672 759,061
Percentage 53.10% 44.95%
County results
President before election

Donald Trump
Republican

 Elected President

Joe Biden
Democratic

Elections in Iowa
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Trump won the state 53.1% to 44.9%. Prior to this election, most news organizations had considered Iowa as either leaning towards Trump or a tossup. As was the case in Ohio, this election has confirmed Iowa's trend toward the GOP. Iowa had voted Democratic in six of seven elections prior to 2016, with the exception being George W. Bush's narrow plurality win in 2004. In 2016, however, Iowa voted for Trump by an unexpectedly large margin of 9.4%, voting over ten points to the right of the nation overall, indicating a possible realignment of the previously Democratic-leaning state towards the GOP, much as in the case of West Virginia in 2000 and 2004. Even though Biden contested the state,[3] Trump ended up carrying it by an only slightly reduced margin of 8.15% even as his national margin of defeat grew by 2.3%, confirming this trend.

Biden became the first Democratic nominee since Jimmy Carter in 1976 to win the presidency without carrying Iowa, as well as the first since FDR in 1940 to win the presidency without carrying Dubuque County. Biden improved on Hillary Clinton’s margins in the Des Moines and Cedar Rapids metropolitan areas and traditionally conservative western Iowa, the latter which borders Nebraska's 2nd congressional district, an electoral vote Trump won in 2016 but lost in 2020. Trump improved on his 2016 performance in populist northeast and south Iowa.

Per exit polling by the Associated Press, Trump's strength in Iowa came from white voters with no college degree, who comprised 62% of the electorate and supported Trump by 58%–40%. Trump swept all religious groups, garnering 66% of white Protestants, 54% of white Catholics, and 76% of white born-again/Evangelical Christians. 53% of voters believed Trump was better able to handle international trade.[4] Trump continued to win the cultural message among Iowa's white voters without a college degree.[5]

During the primary season, there remained hope among Democrats that Iowa would still be a contestable state.[6] However, Trump's well-held victory in the state in the general election also saw Republican congressional candidates -- from Senator Joni Ernst to at least two of the four House seats, including two held by Democrats (one vacated by Dave Loebsack in Iowa's 2nd district) -- winning their election.

Neither Biden nor Trump flipped any counties in the state, although Joe Biden came within 2% of flipping Dallas County, an educated suburb of Des Moines.

Iowa is one of three states that voted twice for Barack Obama and Trump, the other two being Ohio and Florida.

Caucuses

The state's caucuses, traditionally the first major electoral event in the country, were held on February 3, 2020.[7]

Republican caucuses
Main article: 2020 Iowa Republican presidential caucuses

Incumbent president Donald Trump received about 97 percent of the votes in the Republican caucuses, and received 39 of the GOP delegates, while Bill Weld received enough votes to clinch 1 delegate.[8]

This section is an excerpt from 2020 Iowa Republican presidential caucuses[edit]
Counties won by these popular vote results
Congressional districts won by these popular vote results
2020 Iowa Republican presidential caucuses[9][10]
Candidate Votes % Estimated
delegates
Donald Trump 31,465 97.1 39
William Weld 426 1.3 1
Joe Walsh 348 1.1 0
Other 151 0.5 0
Total 32,389 100% 40

Democratic caucuses
Main article: 2020 Iowa Democratic presidential caucuses

After a three-day delay in votes being reported, the Iowa Democratic Party declared that Pete Buttigieg had narrowly won the state delegate equivalent (SDE) count of the Democratic caucuses with 26.2 percent. Bernie Sanders came in second with 26.1 percent of the SDEs, despite the fact that he received more popular votes (26.5 percent) than Buttigieg (25.1 percent). Elizabeth Warren, Joe Biden, and Amy Klobuchar finished in third, fourth, and fifth place, respectively.[11]

This section is an excerpt from 2020 Iowa Democratic presidential caucuses[edit]
2020 Iowa Democratic presidential caucuses[12][13][14]
Candidate Initial
alignment		 Final
alignment[lower-alpha 1]		 State delegate
equivalents		 Pledged
national
convention
delegates[15][lower-alpha 2]
Votes % Votes % Number %
Joe Biden 26,291 14.9 23,605 13.7 340.3238 15.8 [lower-alpha 3]14
Pete Buttigieg 37,572 21.3 43,209 25.1 562.9538 26.17 [lower-alpha 4]12
Bernie Sanders 43,581 24.7 45,652 26.5 562.0214 26.13 [lower-alpha 5]9
Elizabeth Warren 32,589 18.5 34,909 20.3 388.4403 18.1 [lower-alpha 6]5
Amy Klobuchar 22,454 12.7 21,100 12.2 263.8689 12.3 [lower-alpha 7]1
Andrew Yang 8,914 5.1 1,758 1.0 21.8559 1.0
Tom Steyer 3,061 1.7 413 0.2 6.6189 0.3
Michael Bloomberg (did not run yet) 212 0.1 16 0.0 0.2096 0.0
Tulsi Gabbard 341 0.2 16 0.0 0.1143 0.0
Michael Bennet 164 0.1 4 0.0 0.0000 0.0
Deval Patrick 9 0.0 0 0.0 0.0000 0.0
John Delaney (withdrawn) 0 0.0 0 0.0 0.0000 0.0
Other / Write-in 155 0.1 198 0.1 0.6931 0.0
Uncommitted 1,009 0.6 1,420 0.8 3.7321 0.2
Totals[lower-alpha 8] 176,352 100% 172,300 100% 2,150.8321 100% 41

Libertarian caucuses

The Libertarian Party of Iowa conducted their own caucuses on February 8, offering in-person caucus locations and an online virtual caucus. Only registered Libertarian voters were eligible to participate.[17][18]

Election results by county.
  Jacob Hornberger
  Ken Armstrong
  Dan Behrman
  Lincoln Chafee
  Jo Jorgensen
  Adam Kokesh
  John McAfee
  Sam Robb
  Vermin Supreme
  Tie
  No votes
Iowa Libertarian presidential caucus, February 8, 2020[19]
Candidate Votes Percentage
Jacob Hornberger 133 47.52%
Lincoln Chafee 36 12.77%
Jo Jorgensen 18 6.38%
Adam Kokesh 17 6.03%
Dan Behrman 14 4.96%
John McAfee 10 3.55%
Vermin Supreme 9 3.19%
Other (write-in) 8 2.84%
None of the above 8 2.84%
Sam Robb 7 2.48%
Max Abramson 6 2.13%
Mark Whitney 4 1.42%
Arvin Vohra 3 1.06%
Ken Armstrong 2 0.71%
Souraya Faas 2 0.71%
Benjamin Leder 1 0.35%
John Monds 1 0.35%
Total 281 100%

General election

Predictions
Source Ranking As of
The Cook Political Report[20] Tossup October 6, 2020
Inside Elections[21] Tossup October 6, 2020
Sabato's Crystal Ball[22] Lean R November 2, 2020
Politico[23] Tossup October 12, 2020
RCP[24] Tossup October 6, 2020
Niskanen[25] Tossup October 6, 2020
CNN[26] Tossup October 7, 2020
The Economist[27] Tossup October 6, 2020
CBS News[28] Tossup October 6, 2020
270towin[29] Tossup October 6, 2020
ABC News[30] Tossup October 6, 2020
NPR[31] Tossup October 9, 2020
NBC News[32] Tossup October 6, 2020
538[33] Lean R November 2, 2020

Polling

Graphical summary

Aggregate polls

Source of poll
aggregation		 Dates
administered		 Dates
updated		 Joe
Biden
Democratic		 Donald
Trump
Republican		 Other/
Undecided
[lower-alpha 9]		 Margin
270 to Win October 26 – Nov 2, 2020 November 2, 2020 46.2% 47.8% 6.0% Trump +1.6
Real Clear Politics October 21–30, 2020 November 2, 2020 45.8% 47.2% 7.0% Trump +1.4
FiveThirtyEight until November 1, 2020 November 2, 2020 46.1% 47.5% 6.4% Trump +1.4
Average 46.0% 47.5% 6.5% Trump +1.5

Polls

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump
Republican		 Joe
Biden
Democratic		 Jo
Jorgensen
Libertarian		 Howie
Hawkins
Green		 Other Undecided
Public Policy Polling Nov 1–2, 2020 871 (V) – 48% 49% - - 2%[lower-alpha 11] 1%
SurveyMonkey/Axios Oct 20 – Nov 2, 2020 1,489 (LV) ± 3.5% 51%[lower-alpha 12] 48% - - – –
Change Research Oct 29 – Nov 1, 2020 1,084 (LV) ± 3.2% 47% 47% 3% 0% 2%[lower-alpha 13] 1%
Civiqs/Daily Kos Oct 29 – Nov 1, 2020 853 (LV) ± 3.7% 48% 49% - - 3%[lower-alpha 14] 0%
Data for Progress Oct 27 – Nov 1, 2020 951 (LV) ± 3.2% 49% 47% 3% 1% 1%[lower-alpha 15] –
Emerson College Oct 29–31, 2020 604 (LV) ± 3.9% 49%[lower-alpha 16] 47% - - 4% 0%
InsiderAdvantage/Center for American Greatness[upper-alpha 1] Oct 30, 2020 400 (LV) ± 4.9% 48% 46% 1% - – 6%
Selzer & Co./Des Moines Register Oct 26–29, 2020 814 (LV) ± 3.4% 48% 41% - - 8%[lower-alpha 17] 2%[lower-alpha 18]
SurveyMonkey/Axios Oct 1–28, 2020 3,005 (LV) ± 2.5% 50% 49% - - - 2%
Quinnipiac University Oct 23–27, 2020 1,225 (LV) ± 2.8% 47% 46% - - 1%[lower-alpha 19] 6%
RABA Research/WHO13 News Oct 21–24, 2020 693 (LV) ± 4% 46% 50% - - 2%[lower-alpha 20] 1%
Emerson College Oct 19–21, 2020 435 (LV) ± 4.7% 48%[lower-alpha 21] 48% - - 4%[lower-alpha 22] 0%
RMG Research/PoliticalIQ Oct 15–21, 2020 800 (LV) ± 3.5% 47%[lower-alpha 23] 47% - - 2%[lower-alpha 24] 4%
45%[lower-alpha 25] 49% - - 2%[lower-alpha 26] 4%
49%[lower-alpha 27] 48% - - 2%[lower-alpha 28] 4%
Siena College/NYT Upshot Oct 18–20, 2020 753 (LV) ± 3.9% 43% 46% 2% 1% 1%[lower-alpha 29] 7%[lower-alpha 30]
Insider Advantage/Center for American Greatness[upper-alpha 1] Oct 18–19, 2020 400 (LV) ± 4.9% 45% 45% 2% - – 8%
Monmouth University Oct 15–19, 2020 501 (RV) ± 4.4% 48% 47% 1% 0%[lower-alpha 31] 2%[lower-alpha 32] 2%
501 (LV)[lower-alpha 33] 47% 50% - - – –
501 (LV)[lower-alpha 34] 46% 51% - - – –
David Binder Research/Focus on Rural America Oct 10–13, 2020 200 (LV) – 50% 44% - - – –
Data for Progress (D) Oct 8–11, 2020 822 (LV) ± 3.4% 48% 47% 2% 0% – 3%
YouGov/CBS Oct 6–9, 2020 1,035 (LV) ± 3.5% 49% 49% - - 2%[lower-alpha 35] 0%
Opinion Insight/American Action Forum[upper-alpha 2] Oct 5–8, 2020 800 (LV) ± 3.46% 46%[lower-alpha 36] 47% - - 3%[lower-alpha 37] 4%[lower-alpha 38]
Civiqs/Daily Kos Oct 3–6, 2020 756 (LV) ± 3.9% 47% 48% - - 4%[lower-alpha 39] 1%
Quinnipiac University Oct 1–5, 2020 1,205 (LV) ± 2.8% 45% 50% - - 2%[lower-alpha 40] 3%
SurveyMonkey/Axios Sep 1–30, 2020 1,276 (LV) – 52% 46% - - – 2%
Data for Progress (D) Sep 23–28, 2020 743 (LV) ± 3.6% 47%[lower-alpha 23] 44% 1% 1% – 6%
50%[lower-alpha 41] 45% - - – 5%
Hart Research Associates/Human Rights Campaign[upper-alpha 3] Sep 24–27, 2020 400 (LV) ± 4.9% 49% 47% - - – –
RABA Research/WHO13 News Sep 23–26, 2020 780 (LV) ± 4% 46% 48% - - 2%[lower-alpha 42] 4%
Monmouth University Sep 18–22, 2020 402 (RV) ± 4.9% 50% 44% 2% 0% 1%[lower-alpha 43] 2%
402 (LV) 49%[lower-alpha 33] 46% 2% – 2%[lower-alpha 44] 2%
49%[lower-alpha 34] 46% 2% – 2%[lower-alpha 45] 2%
Siena College/NYT Upshot Sep 16–22, 2020 501 (LV) ± 4.99% 42% 45% 2% 0% 1%[lower-alpha 46] 10%[lower-alpha 47]
Selzer & Co./Des Moines Register Sep 14–17, 2020 658 (LV) ± 3.8% 47% 47% - - 4%[lower-alpha 48] 3%
Fabrizio Ward/Hart Research Associates/AARP Aug 30 – Sep 5, 2020 800 (LV) ± 3.5% 47% 45% - - 1%[lower-alpha 49] 6%
Opinion Insight/American Action Forum[upper-alpha 2] Aug 30 – Sep 2, 2020 800 (LV) ± 3.46% 51%[lower-alpha 50] 43% 3% 1% – 2%
SurveyMonkey/Axios Aug 1–31, 2020 983 (LV) – 53% 46% - - – 2%
Monmouth University Jul 30 – Aug 3, 2020 401 (RV) ± 4.9% 48% 45% 3% - <1%[lower-alpha 51] 3%
401 (LV) 48%[lower-alpha 52] 46% 2% <1%[lower-alpha 53] 3%
47%[lower-alpha 54] 47% 2% 0%[lower-alpha 55] 3%
Data for Progress Jul 24 – Aug 2, 2020 1,101 (LV) – 44%[lower-alpha 23] 42% 3% 1% – 10%
46%[lower-alpha 56] 45% - - – 9%
David Binder Research/Focus on Rural America Jul 30–31, 2020 200 (LV) – 43% 49% - - – –
SurveyMonkey/Axios Jul 1–31, 2020 1,095 (LV) – 54% 45% - - – 1%
RMG Research Jul 27–30, 2020 500 (RV) ± 4.5% 41% 40% - - 7% 13%
Public Policy Polling/AFSCME[upper-alpha 4] Jul 23–24, 2020 1,118 (V) – 48% 47% - - – 6%
Spry Strategies/American Principles Project[upper-alpha 5] Jul 11–16, 2020 701 (LV) ± 3.7% 46% 48% - - – 7%
SurveyMonkey/Axios Jun 8–30, 2020 455 (LV) – 50% 48% - - – 2%
Selzer/Des Moines Register Jun 7–10, 2020 674 (LV) ± 3.8% 44% 43% - - 10%[lower-alpha 57] 3%
Civiqs/Daily Kos Jun 6–8, 2020 865 (RV) ± 3.8% 46% 46% - - 7%[lower-alpha 58] 1%
Public Policy Polling/Emily's List[upper-alpha 6] Jun 3–4, 2020 963 (V) – 48% 47% - - – 5%
Public Policy Polling Apr 30 – May 1, 2020 1,222 (V) ± 2.8% 48% 46% - - – 6%
GBAO Strategies/PLUS Paid Family Leave Apr 13–16, 2020 500 (LV) – 48% 45% - - 1% 6%
Selzer/Des Moines Register Mar 2–5, 2020 667 (LV) ± 3.8% 51% 41% - - – –
The New York Times/Siena College Jan 20–23, 2020 1,689 (RV) ± 2.8% 46% 44% - - 5%[lower-alpha 59] 6%
Public Policy Polling Dec 29–31, 2019 964 (V) – 49% 46% - - – 5%
Emerson College Dec 7–10, 2019 1,043 (RV) ± 3% 49% 45% - - – 6%
NYT Upshot/Siena College Oct 25–30, 2019 1,435 (RV) ± 3.1% 45% 44% - - 3% 5%
Emerson College Oct 13–16, 2019 888 (RV) ± 3.2% 51% 49% - - – –
WPA Intelligence (R) Apr 27–30, 2019 200 (LV) ± 6.9% 49% 44% - - – 5%
Emerson College Mar 21–24, 2019 707 (RV) ± 3.6% 47% 53% - - – –
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 49% 51% - - – –
Former candidates

Donald Trump vs. Michael Bloomberg

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Michael
Bloomberg (D)		 Other Undecided
Des Moines Register/Selzer & Co. Mar 2–5, 2020 667 (LV) ± 3.8% 53%[lower-alpha 60] 34% – –
The New York Times/Siena College Jan 20–23, 2020 1,689 (RV) ± 2.8% 47% 39% 7%[lower-alpha 61] 8%

Donald Trump vs. Cory Booker

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Cory
Booker (D)		 Undecided
Emerson College Mar 21–24, 2019 707 (RV) ± 3.6% 52% 48% –

Donald Trump vs. Pete Buttigieg

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Pete
Buttigieg (D)		 Other Undecided
The New York Times/Siena College Jan 20–23, 2020 1,689 (RV) ± 2.8% 45% 44% 4%[lower-alpha 62] 7%
Public Policy Polling Jan 2–4, 2020 964 (V) – 48% 47% – 5%
Emerson College Dec 7–10, 2019 1,043 (RV) ± 3% 46% 45% – 9%
NYT Upshot/Siena College Oct 25–30, 2019 1,435 (RV) ± 3.1% 45% 41% 3% 8%

Donald Trump vs. Kirsten Gillibrand

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Kirsten
Gillibrand (D)		 Undecided
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 54% 46% –

Donald Trump vs. Kamala Harris

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Kamala
Harris (D)		 Undecided
Emerson College Mar 21–24, 2019 707 (RV) ± 3.6% 54% 46% –
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 53% 47% –

Donald Trump vs. Amy Klobuchar

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Amy
Klobuchar (D)		 Other Undecided
The New York Times/Siena College Jan 20–23, 2020 1,689 (RV) ± 2.8% 46% 41% 5%[lower-alpha 63] 8%

Donald Trump vs. Beto O'Rourke

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Beto
O'Rourke (D)		 Undecided
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 53% 47% –

Donald Trump vs. Bernie Sanders

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Bernie
Sanders (D)		 Other Undecided
Des Moines Register/Selzer & Co. Mar 2–5, 2020 667 (LV) ± 3.8% 53% 41% – –
The New York Times/Siena College Jan 20–23, 2020 1,689 (RV) ± 2.8% 48% 42% 4%[lower-alpha 64] 6%
Public Policy Polling Dec 29–31, 2019 964 (V) – 49% 44% – 7%
Emerson College Dec 7–10, 2019 1,043 (RV) ± 3% 50% 43% – 7%
NYT Upshot/Siena College Oct 25–30, 2019 1,435 (RV) ± 3.1% 47% 43% 3% 4%
Emerson College Oct 13–16, 2019 888 (RV) ± 3.2% 49% 51% – –
Emerson College Mar 21–24, 2019 707 (RV) ± 3.6% 49% 51% – –
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 51% 50% – –

Donald Trump vs. Elizabeth Warren

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Elizabeth
Warren (D)		 Other Undecided
Des Moines Register/Selzer & Co. Mar 2–5, 2020 667 (LV) ± 3.8% 52%[lower-alpha 60] 40% – –
The New York Times/Siena College Jan 20–23, 2020 1,689 (RV) ± 2.8% 47% 42% 5%[lower-alpha 65] 7%
Public Policy Polling Jan 2–4, 2020 964 (V) – 49% 44% – 7%
Emerson College Dec 7–10, 2019 1,043 (RV) ± 3% 50% 43% ± 3% 7%
NYT Upshot/Siena College Oct 25–30, 2019 1,435 (RV) ± 3.1% 47% 40% 2% 7%
Emerson College Oct 13–16, 2019 888 (RV) ± 3.2% 51% 49% – –
Emerson College Mar 21–24, 2019 707 (RV) ± 3.6% 51% 49% – –
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 52% 48% – –
Hypothetical polling

with Donald Trump and Sherrod Brown

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Sherrod
Brown (D)		 Undecided
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 55% 46% –

with Donald Trump and Nancy Pelosi

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Nancy
Pelosi (D)		 Undecided
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 55% 45% –

with Donald Trump, Bernie Sanders, and Howard Schultz

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Bernie
Sanders (D)		 Howard
Schultz (I)		 Undecided
Emerson College Mar 21–24, 2019 707 (RV) ± 3.6% 47% 46% 8% –

with Donald Trump, Elizabeth Warren, and Howard Schultz

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Elizabeth
Warren (D)		 Howard
Schultz (I)		 Undecided
Emerson College Mar 21–24, 2019 707 (RV) ± 3.6% 48% 45% 7% –
Emerson College Jan 30 – Feb 2, 2019 831 (RV) ± 3.4% 49% 40% 11% –

with Donald Trump and generic Democrat

Poll source Date(s)
administered		 Sample
size[lower-alpha 10]		 Margin
of error		 Donald
Trump (R)		 Generic
Democrat		 Undecided
Public Policy Polling/End Citizens United[upper-alpha 7] Dec 13–15, 2019 944 (V) – 47% 49% 3%
Public Policy Polling Apr 29–30, 2019 780 (V) ± 3.5% 48% 48% –

Results
2020 United States presidential election in Iowa[34]
Party Candidate Votes % ±%
Republican Donald Trump
Mike Pence 		897,672 53.10% +2.00%
Democratic Joe Biden
Kamala Harris		 759,061 44.95% +3.20%
Libertarian Jo Jorgensen
Spike Cohen		 19,637 1.16% -2.62%
Independent Kanye West
Michelle Tidball		 3,210 0.19% N/A
Green Howie Hawkins
Angela Walker		 3,075 0.18% -0.55%
Constitution Don Blankenship
William Mohr		 1,707 0.10% -0.24%
Alliance Rocky De La Fuente
Darcy Richardson		 1,082 0.06% N/A
Genealogy Know Your Family History Ricki Sue King
Dayna Chandler		 546 0.03% N/A
Independent Brock Pierce
Karla Ballard		 544 0.03% N/A
Write-in 4,337 0.38% -1.09%
Total votes 1,690,871 100.00%

By congressional district
District Trump Biden Representative
1st 50.79% 47.38% Abby Finkenauer
Ashley Hinson
2nd 51.10% 47.10% Dave Loebsack
Mariannette Miller-Meeks
3rd 49.15% 49.02% Cindy Axne
4th 62.68% 35.73% Steve King
Randy Feenstra

See also

Notes
  1. Final vote after votes for candidates below the 15% viability threshold in each precinct are reallocated to other viable candidates.
  2. In Iowa, the presidential caucuses only are the first determining step for the delegate distribution, the final step are the decisions on the district conventions and the much later state convention. According to the provisions set by the Iowa Democratic Party's "Delegate Selection Plan", statewide delegates preliminarily awarded to other candidates had to be reallocated at the state convention on June 13, as their pledged candidates had dropped out, while the already early decided district delegates remain fixed.
  3. Originally placed fourth with 6 delegates. 8 of the 12 statewide delegates initially awarded to Buttigieg (2), Sanders (3) and Warren (3), who had withdrawn in the meantime, had to be reallocated to Biden as the sole remaining viable contender and were added to his own 2 statewide delegates at the state convention on June 13.[15][16]
  4. Original winner with 14 delegates. Due to his withdrawal in March, 2 of the 5 statewide delegates mathematically won by Buttigieg were reallocated to Biden at the state convention on June 13.[15][16]
  5. Original runner-up with 12 delegates. Due to his withdrawal in April, 3 of the 4 statewide delegates mathematically won by Sanders were reallocated to Biden at the state convention on June 13.[15][16]
  6. Originally placed third with 8 delegates. Due to her withdrawal in March, all of the 3 statewide delegates mathematically won by Warren were reallocated to Biden at the state convention on June 13.[15][16]
  7. Falling short of 15% on state level and in three of four districts, Klobuchar only surpassed the treshold in one district and won 1 delegate there.
  8. Per the Iowa Democratic Party official report.[13]
  9. Calculated by taking the difference of 100% and all other candidates combined.
  10. Key:
    A – all adults
    RV – registered voters
    LV – likely voters
    V – unclear
  11. "Someone else" with 2%
  12. Overlapping sample with the previous SurveyMonkey/Axios poll, but more information available regarding sample size
  13. "Don't recall" with 2%
  14. "Someone else" with 3%
  15. "Other candidate or write-in" with 1%
  16. With voters who lean towards a given candidate
  17. "Refused" with 5%; "Someone else" with 3%; would not vote with 0%
  18. Includes "Do not remember"
  19. "Someone else" with 1%
  20. "Someone else" with 2%
  21. With voters who lean towards a given candidate
  22. "Someone else" with 4%
  23. Standard VI response
  24. "Someone else" with 2%
  25. Results generated with high Democratic turnout model
  26. "Someone else" with 2%
  27. Results generated with high Republican turnout model
  28. "Someone else" with 2%
  29. "Someone else" with 1%; would not vote with 0%
  30. Includes "Refused"
  31. No voters
  32. "Another candidate" and "No one" with 1%
  33. With a likely voter turnout model featuring higher turnout than in the 2016 presidential election
  34. With a likely voter turnout model featuring lower turnout than in the 2016 presidential election
  35. "Other third party" with 2%
  36. With voters who lean towards a given candidate
  37. "One of the other candidates" with 2%; West (B) with 1%
  38. Includes "Refused"
  39. "Someone else" with 4%
  40. "Someone else" with 2%
  41. If the only candidates were Biden and Trump
  42. "Other candidate" with 2%
  43. "Another candidate" with 1%; "No one" with no voters
  44. "Hawkins/Other" with 2%
  45. "Hawkins/Other" with 2%
  46. "Someone else" with 1%; Would not vote with 0%
  47. Includes "Refused"
  48. "Someone else" with 4%
  49. Would not vote with 1%
  50. With voters who lean towards a given candidate
  51. "Other" and "No-one" with <1%
  52. With a likely voter turnout model featuring higher turnout than in the 2016 presidential election
  53. "Other" with <1%
  54. With a likely voter turnout model featuring lower turnout than in the 2016 presidential election
  55. "Other" with 0%
  56. If the only candidates were Biden and Trump
  57. "Someone else" with 9%; would not vote with 1%
  58. "Someone else" with 7%
  59. Other with 2%; would not vote with 3%
  60. Additional data sourced from FiveThirtyEight
  61. Other with 3%; would not vote with 4%
  62. Other with 1%; would not vote with 3%
  63. Other with 2%; would not vote with 3%
  64. Other with 2%; would not vote with 2%
  65. Other with 2%; would not vote with 3%
Partisan clients
  1. The Center for American Greatness is a pro-Trump organization
  2. The American Action Forum is a 501 organisation which usually supports Republican candidates
  3. The Human Rights Campaign endorsed Biden prior to this poll's sampling period
  4. AFSCME endorsed Biden prior to this poll's sampling period
  5. This poll's sponsor is the American Principles Project, a 501(c)(4) organization that supports the Republican Party.
  6. Emily's List is an organisation that supports Democratic female candidates
  7. End Citizens United PAC has exclusively endorsed Democratic candidates

References
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Further reading
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