2020 United States Senate election in Iowa

Last updated

2020 United States Senate election in Iowa
Flag of Iowa.svg
  2014 November 3, 2020 2026  
  Joni Ernst, official portrait, 116th Congress 2 (cropped).jpg Theresa Greenfield (cropped).jpg
Nominee Joni Ernst Theresa Greenfield
Party Republican Democratic
Popular vote864,997754,859
Percentage51.74%45.15%

2020 United States Senate election in Iowa results map by county.svg
2020 United States Senate election in Iowa results by congressional district.svg
IA Senate 2020.svg
Ernst:     40–50%     50–60%     60–70%     70–80%     80–90%     >90%
Greenfield:     40–50%     50–60%     60–70%     70–80%     80–90%     >90%
Tie:     40–50%

U.S. senator before election

Joni Ernst
Republican

Elected U.S. Senator

Joni Ernst
Republican

The 2020 United States Senate election in Iowa was held on November 3, 2020, to elect a member of the United States Senate to represent the State of Iowa, concurrently with the 2020 U.S. presidential election, as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. Primaries were held on June 2. [1]

Contents

Most experts and pollsters considered this race and the concurrent presidential race as a tossup due to incumbent president Donald Trump's low approval ratings and Ernst's own popularity dropping in polls, partly due to a viral moment in a debate where she did not know the break-even price for soybeans. [2] Despite this, Ernst was reelected by a larger-than-expected 6.6 points, while Trump simultaneously won the state with a similarly unexpected margin of victory. Ernst carried an overwhelming majority of the state's counties including many rural ones, while Greenfield carried only eight counties: Polk, Linn, Scott, Johnson, Black Hawk, Story, Cerro Gordo and Jefferson. [3]

Republican primary

Candidates

Nominee

Withdrawn

Endorsements

Joni Ernst

Organizations

Result

Republican primary results [10]
PartyCandidateVotes%
Republican Joni Ernst (incumbent) 226,589 98.64%
Republican Write-In3,1321.36%
Total votes229,721 100.00%

Democratic primary

On June 2, 2020, Theresa Greenfield won the Democratic primary with 47.71% of the vote, defeating three other major candidates, including Michael Franken, a retired U.S. Navy admiral and former aide to U.S. Senator Ted Kennedy. [11] [12] [13] [14] [15]

Candidates

Nominee

Eliminated in primary

Withdrawn

  • Cal Woods, journalist and U.S. Navy veteran [21] [22] [23] (endorsed Michael T. Franken)(remained on ballot)

Declined

Debates

Host

network

DateLink(s)Participants
Theresa

Greenfield

Michael

T. Franken

Kimberly

Graham

Eddie

Mauro

Iowa PBS May 18, 2020 [38] PresentPresentPresentPresent

Endorsements

Michael Franken

Federal officials

  • Chuck Hagel, former U.S. Secretary of Defense (2013–2015) and U.S. Senator from Nebraska (1997–2009) [39] (Republican)
Kimberly Graham

Individuals

Organizations

Theresa Greenfield

Federal officials

State officials

Individuals

Unions

Organizations

Polling

Poll sourceDate(s)
administered
Sample
size [a]
Margin
of error
Michael
Franken
Kimberly
Graham
Theresa
Greenfield
Eddie
Mauro
Undecided
Public Policy Polling [56] May 5–6, 2020849 (V)12%4%43%4%36%
Emerson College [57] October 13–16, 2019317 (LV)± 5.5%6%4%11%6%74%

Results

County results
Results by county:

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Greenfield--70-80%
Greenfield--60-70%
Greenfield--50-60%
Greenfield--40-50%
Greenfield--<40%
Franken--<40% Iowa Senate Democratic primary, 2020.svg
County results
Results by county:
  Greenfield—70–80%
  Greenfield—60–70%
  Greenfield—50–60%
  Greenfield—40–50%
  Greenfield—<40%
  Franken—<40%
Democratic primary results [10]
PartyCandidateVotes%
Democratic Theresa Greenfield 132,001 47.71%
Democratic Michael T. Franken 68,85124.88%
Democratic Kimberly Graham41,55415.02%
Democratic Eddie Mauro30,40010.99%
Democratic Cal Woods (withdrawn)3,3721.21%
Democratic Write-In5140.19%
Total votes276,692 100.00%

Other candidates

Rick Stewart, the Libertarian nominee Rick Stewart portrait (cropped).jpg
Rick Stewart, the Libertarian nominee

Libertarian Party

Nominee

Independents

Declared

  • Suzanne Herzog, economist and former ER nurse [59]

General election

Major media described the campaign as one of the most likely to decide control of the Senate after the 2020 election. [60] [61] Polls conducted after the primary showed a close contest between Greenfield and Ernst, with neither candidate leading by more than 4 points. [62] [63] [64] [65]

Through June 2020, Greenfield had raised $11.5 million, compared to $14.6 million for Ernst but by September, Greenfield had pulled ahead, raising $40.0 million compared to $21.6 million for Ernst. [66] [67] [68] The race was expected to be the most expensive in the state's history, [69] and the second most expensive Senate race in the United States, after the 2020 United States Senate election in North Carolina, where Cal Cunningham challenged Thom Tillis. [70]

Debate

HostDate & timeLink(s)Participants
Joni Ernst (R)Theresa Greenfield (D)
Iowa Press DebatesSeptember 28, 2020 [71] PresentPresent

Predictions

SourceRankingAs of
The Cook Political Report [72] TossupOctober 29, 2020
Inside Elections [73] TossupOctober 28, 2020
Sabato's Crystal Ball [74] Lean RNovember 2, 2020
Politico [75] TossupNovember 2, 2020
Daily Kos [76] TossupOctober 30, 2020
RCP [77] TossupOctober 23, 2020
DDHQ [78] TossupNovember 3, 2020
538 [79] TossupNovember 2, 2020
Economist [80] TossupNovember 2, 2020

Additional general election endorsements

Joni Ernst (R)

Organizations

  • Campaign for Working Families [81]
  • Huck PAC [82]

Polling

Graphical summary

Aggregate polling

Theresa Greenfield vs. Joni Ernst
Source of poll aggregationDates administeredDates updatedTheresa GreenfieldJoni ErnstOther/Undecided [b] Margin
Real Clear Politics [100] November 2, 2020November 3, 202045.8%47.2%7.0%
270 to Win [101] November 2, 2020November 3, 202046.6%

47.0%

6.4%
Poll sourceDate(s)
administered
Sample
size [a]
Margin
of error
Joni
Ernst (R)
Theresa
Greenfield (D)
Other/
Undecided
Public Policy Polling [102] November 1–2, 2020871 (V)47%48%5%
Change Research [103] October 29 – November 1, 20201,084 (LV)± 3.2%47%48%4% [c]
Civiqs/Daily Kos [104] October 29 – November 1, 2020853 (LV)± 3.7%47%50%2% [d]
Data for Progress [105] October 27 – November 1, 2020951 (LV)± 3.2%45%49%6% [e]
Emerson College [106] October 29–31, 2020604 (LV)± 3.9%48% [f] 51%2% [g]
InsiderAdvantage (R) [107] [A] October 30, 2020400 (LV)± 4.9%51%45%4% [h]
Selzer & Co./Des Moines Register [108] October 26–29, 2020814 (LV)± 3.4%46%42%11% [i]
Quinnipiac University [109] October 23–27, 20201,225 (LV)± 2.8%48%46%1% [j]
RABA Research [110] October 21–24, 2020693 (LV)± 4%45%51%
Emerson College [111] October 19–21, 2020435 (LV)± 4.7%51% [f] 46%3% [k]
RMG Research [112] October 15–21, 2020800 (LV)± 3.5%43% [l] 46%10% [m]
41% [n] 48%10% [m]
45% [o] 45%10% [m]
Siena College/NYT Upshot [113] October 18–20, 2020753 (LV)± 3.9%45%44%12% [p]
Insider Advantage (R) [114] [A] October 18–19, 2020400 (LV)± 4.9%43%48%8% [q]
Monmouth University [115] October 15–19, 2020501 (RV)± 4.4%47%47%5% [r]
501 (LV) [s] 47%49%
501 (LV) [t] 45%51%
Data for Progress (D) [116] October 8–11, 2020822 (LV)± 3.4%43%47%10% [u]
YouGov/CBS [117] October 6–9, 20201,022 (LV)± 3.5%43%47%10% [v]
Opinion Insight (R) [118] [B] October 5–8, 2020800 (LV)± 3.46%47% [f] 45%8% [w]
Civiqs/Daily Kos [119] October 3–6, 2020756 (LV)± 3.9%46%49%6% [x]
Quinnipiac University [120] October 1–5, 20201,205 (LV)± 2.8%45%50%5% [j]
Data for Progress (D) [121] September 23–28, 2020743 (LV)± 3.6%42% [l] 44%14% [y]
45% [z] 46%9% [aa]
Hart Research Associates (D) [122] [C] September 24–27, 2020400 (LV)± 4.9%48%48%
RABA Research [123] September 23–26, 2020780 (LV)± 4%39%51%
Monmouth University [124] September 18–22, 2020402 (RV)± 4.9%47%47%5% [ab]
402 (LV) [s] 46%49%5% [ac]
402 (LV) [t] 47%48%5% [ac]
Siena College/NYT Upshot [125] September 16–22, 2020501 (LV)± 4.99%40%42%19% [ad]
Selzer/Des Moines Register [126] September 14–17, 2020658 (LV)± 3.8%42%45%12% [ae]
Fabrizio Ward/Hart Research Associates [127] [D] August 30 – September 5, 2020800 (LV)± 3.5%50%45%5% [af]
Opinion Insight (R) [128] [B] August 30 – September 2, 2020800 (LV)± 3.46%49% [f] 43%7% [ag]
Public Policy Polling [129] August 13–14, 2020729 (V)± 4.1%45%48%8% [ah]
Monmouth University [130] July 30 – August 3, 2020401 (RV)± 4.9%48%45%6% [ai]
401 (LV) [s] 48%47%6% [ai]
401 (LV) [t] 48%47%5% [aj]
Data for Progress [131] July 24 – August 2, 20201,101 (LV)± 3.2%43%45%11% [ak]
RMG Research [132] July 27–30, 2020500 (RV)± 4.5%36%40%24% [al]
Spry Strategies (R) [133] [E] July 11–16, 2020701 (LV)± 3.7%43%45%12% [am]
GQR Research (D) [134] [F] June 23–28, 2020800 (LV)± 3.5%47%49%4%
Selzer/Des Moines Register [135] June 7–10, 2020674 (LV)± 3.8%43%46%11%
Civiqs/Daily Kos [136] June 6–8, 2020865 (RV)± 3.8%45%48%6%
Public Policy Polling (D) [137] [G] June 3–4, 2020963 (V)± 3.4%43%45%12%
Public Policy Polling [138] April 30 – May 1, 20201,222 (V)± 2.8%43%42%14%
Public Policy Polling (D) [139] [F] December 13–15, 2019944 (V)± 3.4%47%41%12%
Emerson College [57] October 13–16, 2019888 (RV)± 3.2%47%40%14%
Lake Research Partners (D) [140] [H] April 24–29, 2019500 (LV)± 4.4%56%34%
Hypothetical polling

with Eddie Mauro

Poll sourceDate(s)
administered
Sample
size [a]
Margin
of error
Joni
Ernst (R)
Eddie
Mauro (D)
Undecided
RABA Research/Eddie Mauro [141] [H] May 7–9, 2020632 (LV)± 3.9%42%42%
Lake Research Partners (D) [140] [H] April 24–29, 2019500 (LV)± 4.4%58% [l] 33%
49% [an] 44%

with Joni Ernst and generic Democrat

Poll sourceDate(s)
administered
Sample
size [a]
Margin
of error
Joni
Ernst (R)
Generic
Democrat
Undecided
Public Policy Polling [142] April 29–30, 2019780 (V)± 3.5%48%44%
Public Policy Polling (D) [143] [I] June 30 – July 1, 2017784 (V)± 3.6%48%41%12%

with Joni Ernst and Generic Opponent

Poll sourceDate(s)
administered
Sample
size [a]
Margin
of error
Joni
Ernst (R)
Generic
Opponent
OtherUndecided
Des Moines Register/Selzer & Co. [144] March 2–5, 2020667 (LV)± 3.8%41%31%3% [ao] 26% [ap]

with generic Republican and generic Democrat

Poll sourceDate(s)
administered
Sample
size [a]
Margin
of error
Generic
Republican
Generic
Democrat
Undecided
Lake Research Partners (D) [140] [H] April 24–29, 2019500 (LV)± 4.4%45%41%

Results

State senate district results 2020 United States Senate election in Iowa results by state senate district.svg
State senate district results
2020 United States Senate election in Iowa [145]
PartyCandidateVotes%±%
Republican Joni Ernst (incumbent) 864,997 51.74% −0.36%
Democratic Theresa Greenfield 754,85945.15%+1.39%
Libertarian Rick Stewart36,9612.21%+1.48%
Independent Suzanne Herzog13,8000.83%N/A
Write-in 1,2110.07%-0.03%
Total votes1,671,828 100.0%
Republican hold

By county

By county
County [146] Joni Ernst
Republican
Theresa Greenfield
Democratic
Rick Stewart
Libertarian
Suzanne Herzog
Independent
Write-in MarginTotal
votes
#%#%#%#%#%#%
Adair 2,80967.781,20729.13892.15360.8730.071,60238.664,144
Adams 1,49769.3459427.51462.13190.8830.1490341.822,159
Allamakee 4,47861.042,60235.471752.39801.0910.011,87625.577,336
Appanoose 4,18965.601,95630.631682.63711.1120.032,23334.976,386
Audubon 2,18864.891,09232.38702.08210.6210.031,09632.503,372
Benton 8,83060.935,20235.903312.281200.8390.063,62825.0314,492
Black Hawk 29,22244.2734,96352.961,3011.974900.74370.06-5,741-8.7066,013
Boone 8,31554.746,31641.583852.531671.1070.051,99913.1615,190
Bremer 8,19656.725,91140.912541.76840.5850.032,28515.8114,450
Buchanan 6,06356.644,29240.102482.32960.9050.051,77116.5510,704
Buena Vista 4,72459.093,02237.801662.08750.9470.091,70221.297,994
Butler 5,29166.062,47430.891732.16690.8620.022,81735.178,009
Calhoun 3,51367.401,53129.371292.48320.6170.131,98238.035,212
Carroll 7,24564.913,58032.072302.06960.86110.103,66532.8311,162
Cass 4,72565.952,25931.531201.67540.7570.102,46634.427,165
Cedar 5,93556.304,30040.792262.14740.7060.061,63515.5110,541
Cerro Gordo 11,33948.1911,53449.024301.832110.90160.07-195-0.8323,530
Cherokee 4,21465.592,00231.161382.15671.0440.062,21234.436,425
Chickasaw 4,02461.162,32435.321592.42711.0820.031,70025.846,580
Clarke 2,90663.051,52032.981192.58601.3040.091,38630.074,609
Clay 5,71664.462,86132.261932.18891.0090.102,85532.198,868
Clayton 5,84561.373,43436.061571.65820.8660.062,41125.319,524
Clinton 12,55951.5710,94244.936352.612000.82150.061,6176.6424,351
Crawford 4,42463.122,33633.331602.28801.1490.132,08829.797,009
Dallas 28,72751.6925,42745.751,0061.813810.69330.063,3005.9455,574
Davis 2,72867.511,16728.881122.77320.7920.051,56138.634,041
Decatur 2,43965.211,16531.15902.41431.1530.081,27434.063,740
Delaware 6,45464.963,23532.561721.73710.7140.043,21932.409,936
Des Moines 9,46848.279,29647.395913.012321.18290.151720.8819,616
Dickinson 7,14963.923,79133.901741.56660.5940.043,35830.0311,184
Dubuque 26,03449.0525,43347.911,1482.164280.81370.076011.1353,080
Emmet 2,96561.811,63734.131473.06470.9810.021,32827.684,797
Fayette 5,86558.063,91238.732292.27890.8870.071,95319.3310,102
Floyd 4,18152.453,49843.881872.35981.2380.106838.577,972
Franklin 3,27064.551,63932.351001.97500.9970.141,63132.205,066
Fremont 2,56367.311,09928.86892.34561.4710.031,46438.453,808
Greene 3,06361.361,78435.741042.08390.7820.041,27925.624,992
Grundy 4,90067.902,12029.381542.13380.5350.072,78038.527,217
Guthrie 4,10364.862,00031.621622.56560.8950.082,10333.246,326
Hamilton 4,67959.422,91336.991902.41841.0790.111,76622.437,875
Hancock 4,00465.861,88130.941302.14600.9950.082,12334.926,080
Hardin 5,63963.802,92033.041952.21840.9510.012,71930.768,839
Harrison 5,05963.102,57432.102533.161181.47140.172,48530.998,018
Henry 5,87560.123,45735.383103.171161.19140.142,41824.749,772
Howard 2,71655.362,01441.051182.41581.1800.0070214.314,906
Humboldt 3,67169.741,44327.411082.05400.7620.042,22842.335,264
Ida 2,75772.2396425.26661.73280.7320.051,79346.973,817
Iowa 5,79460.133,54136.752052.13840.87110.112,25323.389,635
Jackson 6,17556.584,24938.943663.351181.0850.051,92617.6510,913
Jasper 11,40556.957,90539.475312.651670.83180.093,50017.4820,026
Jefferson 4,00845.504,54751.621631.85800.91100.11-539-6.128,808
Johnson 23,77328.7757,06369.061,3821.673730.45420.05-33,290-40.2982,633
Jones 6,32057.974,23738.862732.50680.6240.042,08319.1110,902
Keokuk 3,56568.391,48928.561011.94531.0250.102,07639.825,213
Kossuth 5,95766.142,79931.081932.14570.6300.003,15835.079,006
Lee 8,48951.297,44544.984852.931220.74110.071,0446.3116,552
Linn 53,24842.1069,12554.663,1882.528150.64900.07-15,877-12.55126,466
Louisa 3,25961.971,80434.301412.68510.9740.081,45527.675,259
Lucas 3,10568.321,30228.65992.18360.7930.071,80339.674,545
Lyon 5,52281.801,07315.891041.54500.7420.034,44965.906,751
Madison 6,24564.253,16832.592182.24860.8830.033,07731.669,720
Mahaska 7,86070.002,96926.442732.431181.0580.074,89143.5611,228
Marion 12,21164.066,26932.894232.221440.76150.085,94231.1719,062
Marshall 9,05750.688,18745.814422.471650.92210.128704.8717,872
Mills 5,34765.542,54431.181772.17821.0180.102,80334.368,158
Mitchell 3,34757.692,28239.331242.14490.8400.001,06518.365,802
Monona 3,05465.471,45531.191082.32390.8490.191,59934.284,665
Monroe 2,74268.401,14828.64842.10340.8510.021,59439.764,009
Montgomery 3,63368.531,52028.67981.85460.8740.082,11339.865,301
Muscatine 10,27850.289,38145.895702.791990.97130.068974.3920,441
O'Brien 5,67576.051,64021.981051.41380.5140.054,03554.077,462
Osceola 2,52577.3865720.13491.50310.9510.031,86857.253,263
Page 5,15269.272,06727.791381.86781.0530.043,08541.487,438
Palo Alto 3,11363.121,67734.001062.15360.7300.001,43629.124,932
Plymouth 10,14572.263,58725.552191.56770.55110.086,55846.7114,039
Pocahontas 2,64169.871,00326.53912.41391.0360.161,63843.333,780
Polk 106,44341.54142,32855.545,3132.071,9850.771880.07-35,885-14.00256,257
Pottawattamie 24,72054.8518,52041.101,2692.825241.16320.076,20013.7645,065
Poweshiek 5,36153.384,38143.622022.01910.9180.089809.7610,043
Ringgold 1,87069.3673227.15752.78160.5930.111,13842.212,696
Sac 3,84970.171,44026.251292.35601.0970.132,40943.925,485
Scott 42,94146.8845,75149.942,1392.337090.77660.07-2,810-3.0791,606
Shelby 4,48967.061,98929.711562.33570.8530.042,50037.356,694
Sioux 15,78583.542,82814.971921.02810.4390.0512,95768.5718,895
Story 20,75041.0828,21655.861,1332.243700.73440.09-7,466-14.7850,513
Tama 5,09056.743,58840.002052.29790.8880.091,50216.748,970
Taylor 2,33772.8076223.74832.59280.8700.001,57549.073,210
Union 3,82062.382,05133.491722.81761.2450.081,76928.896,124
Van Buren 2,58368.841,06528.38752.00280.7510.031,51840.463,752
Wapello 8,46455.156,34441.333942.571320.86140.092,12013.8115,348
Warren 17,27656.2712,47840.646922.252340.76230.074,79815.6330,703
Washington 6,77358.124,51938.782622.25950.8250.042,25419.3411,654
Wayne 2,18671.5578425.66531.73280.9240.131,40245.893,055
Webster 10,19557.816,84538.814032.291730.98190.113,35019.0017,635
Winnebago 3,33656.292,36139.841532.58721.2140.0797516.455,926
Winneshiek 6,03950.495,58146.662181.821180.9940.034583.8311,960
Woodbury 24,17554.2718,67441.929942.236291.41720.165,50112.3544,544
Worth 2,42555.401,80341.19982.24461.0550.1162214.214,377
Wright 3,88962.852,06333.341582.55761.2320.031,82629.516,188
Totals864,99751.74754,85945.1536,9612.2113,8000.831,2110.07110,1386.591,671,828

Counties that flipped from Democratic to Republican

Counties that flipped from Republican to Democratic

By congressional district

By congressional district
District [145] Joni Ernst
Republican
Theresa Greenfield
Democratic
Rick Stewart
Libertarian
Suzanne Herzog
Independent
Write-in MarginTotal votes Representative
(2020)
#%#%#%#%#%#%
1st district 206,55949.48197,79247.729,4542.263,2310.772670.068,7672.10417,483 Ashley Hinson
2nd district 199,74149.17193,58847.659,4262.323,1970.792950.076,1531.51406,247 Mariannette Miller-Meeks
3rd district 221,26748.75218,75648.209,7472.153,7570.833210.072,5110.55453,848 Cindy Axne
4th district 237,43060.22144,54336.668,3342.113,6150.923280.0892,88723.56394,250 Randy Feenstra
Totals864,99751.74754,85945.1536,9612.2113,8000.831,2110.07110,1386.591,671,828

See also

Notes

Partisan clients

  1. 1 2 Poll sponsored by The Center for American Greatness, a pro-Trump organization.
  2. 1 2 Poll sponsored by The American Action Forum, which is a 501 organization which usually supports Republican candidates.
  3. Poll sponsored by The Human Rights Campaign, which has endorsed Biden prior to this poll's sampling period.
  4. Poll sponsored by AARP.
  5. This poll's sponsor is the American Principles Project, a 501 that supports the Republican Party.
  6. 1 2 Poll sponsored by the End Citizens United, which has only supported Democratic candidates who are against the landmark Citizens United Supreme Court ruling.
  7. Poll sponsored by Emily's List, an organization that supports Democratic female candidates.
  8. 1 2 3 4 Poll sponsored by the Eddie Mauro campaign
  9. Poll sponsored by Save My Care, a pro-Affordable Care Act organization

Voter samples

  1. 1 2 3 4 5 6 Key:
    A – all adults
    RV – registered voters
    LV – likely voters
    V – unclear
  2. Calculated by taking the difference of 100% and all other candidates combined.
  3. Stewart (L) with 2%; "Don't recall" and Undecided with 1%; Herzog (I) and would not vote with 0%
  4. Stewart (L) and Undecided with 1%; Herzog (I) and "Someone else" with 0%
  5. Herzog (I) with 3%; Stewart (L) with 2%; "Other candidate or write-in" with 1%
  6. 1 2 3 4 With voters who lean towards a given candidate
  7. "Someone else" with 2%
  8. Herzog (I) and Stewart (L) with 1%; Undecided with 3%
  9. "Refused" with 4%; "Someone else" and "Undecided/do not remember" with 3%; would not vote with 1%
  10. 1 2 "Someone else" with 1%; Undecided with 4%
  11. "Someone else" with 3%
  12. 1 2 3 Standard VI response
  13. 1 2 3 "Someone else" with 3%; Undecided with 7%
  14. Results generated with high Democratic turnout model
  15. Results generated with high Republican turnout model
  16. Herzog (I) and Stewart (L) with 2%; "Someone else" and would not vote with 1%; "Undecided/Refused" with 6%
  17. Stewart (L) with 5%; Herzog (I) with 0%; Undecided with 3%
  18. Herzog (I), "No one" and Stewart (L) with 1%; "Other" with 0%; Undecided with 2%
  19. 1 2 3 With a likely voter turnout model featuring higher turnout than in the 2016 presidential election
  20. 1 2 3 With a likely voter turnout model featuring lower turnout than in the 2016 presidential election
  21. Stewart (L) with 2%; Herzog (I) with 1%; "Other" with 0%; Undecided with 6%
  22. "Someone else" with 2%; Undecided with 8%
  23. Would not vote with 1%; "Someone else" with 0%; "Undecided/Refused" with 4%
  24. Stewart (L) with 2%; Herzog (I) with 1%; "Someone else" with 0%; Undecided with 3%
  25. Herzog (I) and Stewart (L) with 1%; Undecided with 12%
  26. If the only candidates were Ernst and Greenfield
  27. Undecided with 9%
  28. Stewart (L) with 1%; Herzog (I), "Other" and "No one" with 0%; Undecided with 4%
  29. 1 2 Stewart (L) with 1; Herzog (I) with 0%; Undecided with 4%
  30. Herzog (I) and Stewart (L) with 2%; would not vote with 1%; "someone else" with 0%; "Undecided/Refused" with 14%
  31. "Someone else" with 3%; would not vote with 2%; Undecided with 7%
  32. Would not vote with 1%; Undecided with 4%
  33. Would not vote with 1%; Undecided with 7%
  34. Undecided with 8%
  35. 1 2 Stewart (L) with 2%; Herzog (I) with 1%; Undecided with 3%
  36. Stewart (L) and Undecided with 2%; Herzog (I) with 1%
  37. "No one" with 11%
  38. Undecided with 24%
  39. "Another candidate" with 6%; Undecided with 7%
  40. Response after pollster addresses respondents with talking points about Ernst and Mauro
  41. Would not vote with 3%
  42. "Would consider voting for someone else" with 20%; "unsure" with 6%

References

  1. "United States Senate election in Iowa, 2020 (June 2 Democratic primary)". ballotpedia.org. Retrieved January 13, 2020.
  2. Rosenberg, Benjamin (October 16, 2020). "Joni Ernst didn't know the price of soybeans. Here's why that could cost her". Vox. Retrieved May 25, 2023.
  3. "United States Senate election in Iowa, 2020 (General Election)".
  4. Cohen, Zach C. (December 5, 2018). "How 2014's Outsiders Became 2020's Insiders". National Journal. Archived from the original on July 9, 2019. Retrieved December 5, 2018.
  5. Axelrod, Tal (December 8, 2018). "Iowa's Ernst will run for reelection in 2020". TheHill. Retrieved December 30, 2018.
  6. 1 2 3 4 5 Gunzburger, Ron. "Politics1 – Online Guide to Iowa Politics". politics1.com. Retrieved December 31, 2018.
  7. Tope, Mallory (October 31, 2019). "Candidates gear up campaigns for Iowa U.S. Senate race". Iowa State Daily. Archived from the original on September 13, 2020. Retrieved May 15, 2020.
  8. "Primary Election". sos.iowa.gov.
  9. "2020 Candidates". maggieslist.org.
  10. 1 2 "Primary Election – 2020 CANVASS SUMMARY" (PDF). Iowa Secretary of State. Retrieved August 27, 2020.
  11. "State of Iowa 2020 Primary Election Results". The Des Moines Register. June 3, 2020. Retrieved September 5, 2020.
  12. Panetta, Grace. "Theresa Greenfield wins the Democratic primary for US Senate in Iowa". Business Insider. Retrieved August 24, 2020.
  13. Manchester, Julia (June 2, 2020). "Greenfield wins Senate Democratic primary in Iowa". The Hill. Retrieved September 14, 2020.
  14. Pfannenstiel, Brianne. "Theresa Greenfield to take on Joni Ernst in high-profile battle for U.S. Senate seat". Des Moines Register. Retrieved August 7, 2020.
  15. "Democrats Fight for Chance to Take on GOP Sen. Ernst in Iowa". The New York Times. The Associated Press. June 1, 2020. ISSN   0362-4331 . Retrieved June 7, 2020.
  16. Gerber, Drew [@dagerber] (June 3, 2019). "Theresa Greenfield launches her campaign for #IASEN. She's been highly sought after by the party" (Tweet). Retrieved June 3, 2019 via Twitter.
  17. Pfannenstiel, Brianne (August 26, 2019). "Retired Navy Admiral Michael Franken to run for U.S. Senate, challenge Joni Ernst". Des Moines Register. Retrieved August 26, 2019.
  18. Becker, Amanda; Jackson, Katharine (January 19, 2019). "Women protest in hundreds of U.S. cities for third straight year". Reuters. Retrieved May 11, 2019.
  19. Wade, Jazmen (July 20, 2019). "Iowa US Senate Candidate Kimberly Graham for the People". KHQA.
  20. Iowa Starting Line [@IAStartingLine] (May 19, 2019). "Guess we'll wait for the official thing tomorrow AM, but FYI #IASenpic.twitter.com/E0EJWVXsRF" (Tweet). Retrieved May 19, 2019 via Twitter.
  21. Rivers, Amie (March 2, 2020). "U.S. Senate candidate Cal Woods looking to take on 'climate crisis' if elected". The Courier.
  22. "Meet Cal". Cal for Iowa. Archived from the original on April 10, 2020. Retrieved April 10, 2020.
  23. Lynch, James Q. "Cal Woods drops out of Iowa Democratic U.S. Senate race". The Gazette. Retrieved May 5, 2020.
  24. Price, Dave [@idaveprice] (April 30, 2019). "Confirmed: Iowa Democrat @RepCindyAxne running for re-election in the 3rd District. Not running for senate against @SenJoniErnst in 2020. Axne is in her first term after defeating two term incumbent @RepDavidYoung in 2018. @WHOhd #iowavotes2020" (Tweet). Retrieved April 30, 2019 via Twitter.
  25. "2020 Senate At-A-Glance" (PDF). Cook Political Report. Retrieved January 9, 2019.
  26. "Democrats look to unseat Joni Ernst in 2020 Senate race". The Washington Times. Retrieved December 28, 2018.
  27. Bowman, Bridget (August 21, 2019). "House freshmen try to keep it local as presidential race steals the spotlight". Roll Call. Retrieved August 22, 2019.
  28. 1 2 Meyer, Elizabeth (September 24, 2019). "Finkenauer Endorses Greenfield In Effort To Unseat Ernst". Iowa Starting Line.
  29. "Endorsement Alert!". us7.campaign-archive.com. Retrieved August 30, 2019.
  30. 1 2 3 "Who will run against Joni Ernst in 2020?". Iowa Starting Line. November 12, 2018. Retrieved November 12, 2018.
  31. Arkin, James (February 27, 2019). "Senate recruiting notebook: Duran clarifies field facing Gardner". Politico. Retrieved February 27, 2019. And former state Sen. Rita Hart, the 2018 Democratic nominee for lieutenant governor, is a potential candidate, according to multiple Iowa Democrats, but she has not discussed a campaign publicly.
  32. Weig, Nick (February 26, 2019). "Sen. Liz Mathis meets with Democrats in D.C. to talk about 2020 Senate race". CBS2 . Retrieved February 27, 2019.
  33. Rynard, Pat (February 25, 2019). "Who's Gearing Up To Challenge Joni Ernst?". Iowa Starting Line. Retrieved February 25, 2019.
  34. Judd, Donald (August 5, 2019). "Iowa native JD Scholten announces second bid to unseat GOP Rep. Steve King". CNN. Retrieved August 5, 2019.
  35. Pfannenstiel, Brianne (February 22, 2019). "Former Iowa Gov. Tom Vilsack will not run for the U.S. Senate against Sen. Joni Ernst in 2020". Des Moines Register. Retrieved February 22, 2019.
  36. "Stacey Walker won't seek U.S. Senate nomination". The Gazette. August 12, 2019. Retrieved August 12, 2019.
  37. Lynch, James Q. "Linn County Supervisor Stacey Walker endorses Kimberly Graham for Senate". The Gazette. Retrieved October 30, 2019.
  38. "Iowa Press Debates: U.S. Senate Democratic Primary". www.youtube.com.
  39. "The Public Pulse: Davis essay rang true; Hagel supports Franken; Trump is the real threat". Omaha.com. May 28, 2020.
  40. 1 2 3 4 "Endorsements". Kimberly Graham for U.S. Senate. Retrieved April 2, 2020.
  41. "Kimberly Graham". Brand New Congress. October 23, 2019. Archived from the original on October 29, 2019. Retrieved October 29, 2019.
  42. Murray, Isabella (December 5, 2019). "Iowa Climate Strikes Will Draw National, State Political Leaders". Iowa Starting Line.
  43. "IA-Sen: Sen. Sherrod Brown (D. OH) Helps Theresa Greenfield (D) Get Ready To Defeat Joni Ernst (R)". Daily KOS. December 16, 2019.
  44. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 "Endorsements". greenfieldforiowa.com. Archived from the original on May 7, 2020. Retrieved May 9, 2020.
  45. Opsahl, Robin (June 25, 2019). "Theresa Greenfield nets endorsement from Rep. Dave Loebsack in Democratic Senate primary". Des Moines Register.
  46. Obama, Barack (August 3, 2020). "First Wave of 2020 Endorsements". medium.com. Retrieved September 7, 2020.
  47. Brown, Kris (January 8, 2020). "Brady Endorses Theresa Greenfield for U.S. Senate: Iowa Needs A Common-sense Champion". Brady.
  48. "DSCC Endorses Theresa Greenfield in Iowa Senate Campaign". DSCC: Democratic Senatorial Campaign Committee. June 6, 2019.
  49. "EMILY's List Endorses Theresa Greenfield for U.S. Senate in Iowa". Emily's List. June 6, 2019.
  50. Muller, Tiffany (July 10, 2019). "End Citizens United Endorses Theresa Greenfield; Names Ernst to "Big Money 20"". End Citizens United.
  51. "2020 – Feminist Majority PAC". feministmajoritypac.org.
  52. "In Key Senate Races, Giffords Backs Challengers in Iowa and North Carolina Taking on NRA-Backed Incumbents". Giffords. April 10, 2020.
  53. Burke, Holly (October 2, 2019). "LCV Action Fund Endorses Theresa Greenfield for U.S. Senate". League of Conservation Voters . Retrieved November 26, 2019.
  54. "NARAL Pro-Choice America Endorses Theresa Greenfield for U.S. Senate". NARAL Pro-Choice America. November 7, 2019.
  55. "2020 Endorsements". Population Connection. Archived from the original on September 18, 2020. Retrieved May 9, 2020.
  56. Public Policy Polling
  57. 1 2 Emerson College
  58. "The Green Papers: Iowa 2020 General Election". The Green Papers. May 15, 2020. Retrieved May 15, 2020.
  59. "Suzanne Herzog For US Senate – Iowa's Independent Voice". Archived from the original on December 16, 2019. Retrieved December 16, 2019.
  60. Phillips, Amber (August 7, 2020). "The most competitive Senate races of 2020". The Washington Post. Retrieved September 19, 2020.
  61. Nilsen, Ella (September 14, 2020). "The ways Democrats could retake the Senate majority, explained". Vox. Retrieved September 19, 2020.
  62. "Iowa Senate – Ernst vs. Greenfield". RealClear Politics. Retrieved September 5, 2020.
  63. "Iowa U.S. Senate Polls". FiveThirtyEight. June 28, 2018. Archived from the original on May 14, 2020. Retrieved September 5, 2020.
  64. Pfannenstiel, Brianne (June 13, 2020). "Iowa Poll: Theresa Greenfield leads Joni Ernst in tight race for U.S. Senate". The Des Moines Register. Retrieved September 5, 2020.
  65. "IOWA: CLOSE CONTESTS FOR PREZ & SENATE" (Press release). West Long Branch, NJ: Monmouth University. August 5, 2020. Retrieved September 5, 2020.
  66. Panetta, Grace (August 7, 2020). "What you need to know about the US Senate election in Iowa between Joni Ernst and Theresa Greenfield". Business Insider. Retrieved September 5, 2020.
  67. Coltrain, Nick. "Record-smashing Iowa Senate race fuels deluge of final-stretch campaign spending". Des Moines Register.
  68. "Iowa Senate 2020 Race". OpenSecrets.
  69. Gabriel, Trip (September 2, 2020). "Joni Ernst, in a Tight Senate Race, Repeats a Debunked Coronavirus Theory". The New York Times. Retrieved September 7, 2020.
  70. Pfannenstiel, Brianne. "In a slew of competitive Senate races, Iowa's draws second-highest advertising spending in the country". Des Moines Register. Retrieved September 22, 2020.
  71. "Iowa Press Debates: U.S. Senate". Iowa Press Debates. September 28, 2020. Archived from the original on October 20, 2020. Retrieved October 15, 2020.
  72. "2020 Senate Race Ratings for October 29, 2020". The Cook Political Report. Retrieved March 11, 2021.
  73. "2020 Senate Ratings". Senate Ratings. The Rothenberg Political Report. Retrieved March 11, 2021.
  74. "2020 Senate race ratings". Sabato's Crystal Ball. Retrieved March 12, 2021.
  75. "2020 Election Forecast". Politico . Retrieved October 21, 2020.
  76. "2020 Senate Race Ratings". Daily Kos Elections. Retrieved March 13, 2021.
  77. "Battle for the Senate 2020". RCP. October 23, 2020.
  78. "2020 Senate Elections Model". Decision Desk HQ. September 2, 2020. Retrieved October 21, 2020.
  79. Silver, Nate (August 12, 2020). "Forecasting the race for the Senate". FiveThirtyEight . Archived from the original on September 18, 2020. Retrieved October 21, 2020.
  80. "Forecasting the US elections". The Economist. November 2, 2020. Retrieved March 13, 2021.
  81. "Endorsed Candidates". www.cwfpac.com. Campaign for Working Families. Retrieved August 26, 2020.
  82. PAC, Huck. "Candidates – Huck PAC". www.huckpac.com.
  83. Kirsten Gillibrand (February 5, 2020). "Off the Sidelines Endorsed Candidates".
  84. "Endorsements | Warren Democrats". elizabethwarren.com. Archived from the original on January 7, 2021. Retrieved November 1, 2020.
  85. "U.S. Senate – Education Votes". educationvotes.nea.org.
  86. "Iowa – Official UAW Endorsements". uawendorsements.org. United Automobile Workers.
  87. "Cedar Rapids Gazette Editorial Board Endorses Greenfield: "It's time for a new voice in the Senate, that voice is Theresa Greenfield."". October 3, 2020. Archived from the original on November 13, 2020. Retrieved October 31, 2020.
  88. "Des Moines Register Editorial Board Endorsement: "Greenfield should be given an opportunity to refocus the junior senator's office on working Iowans" – Theresa Greenfield". Theresa Greenfield. October 18, 2020. Archived from the original on November 1, 2020. Retrieved October 31, 2020.
  89. "Telegraph Herald Editorial Board: "Greenfield merits opportunity to serve Iowa in U.S. Senate"". October 25, 2020. Archived from the original on November 3, 2020. Retrieved October 31, 2020.
  90. "Our pick: Send Theresa Greenfield and Rita Hart to Congress".
  91. "Quad-City Times Editorial Board: "We endorse Theresa Greenfield for U.S. Senate."". October 9, 2020. Archived from the original on October 21, 2020. Retrieved October 31, 2020.
  92. "2020 Endorsements".
  93. "Theresa Greenfield". Climate Hawks Vote.
  94. "Theresa Greenfield for Senate (D-IA) – Council for a Livable World". Council for a Livable World.
  95. "Democracy for America endorses Theresa Greenfield for U.S. Senate in Iowa". Democracy for America. February 12, 2020.
  96. "Everytown For Gun Safety Action Fund Endorses Theresa Greenfield for U.S. Senate in Iowa". Everytown. June 9, 2020.
  97. "JStreetPAC Candidates". JStreetPAC. Archived from the original on May 2, 2018. Retrieved November 1, 2020.
  98. "Candidates We Endorse and Support". NCPSSM.
  99. "NRDC Action Fund Endorses 11 House, Senate Candidates". nrdcactionfund.org. June 15, 2020.
  100. Real Clear Politics
  101. 270 to Win
  102. Public Policy Polling
  103. Change Research
  104. Civiqs/Daily Kos
  105. Data for Progress
  106. Emerson College
  107. InsiderAdvantage (R) Archived November 1, 2020, at the Wayback Machine
  108. Selzer & Co./Des Moines Register
  109. Quinnipiac University
  110. RABA Research
  111. Emerson College
  112. RMG Research Archived October 31, 2020, at the Wayback Machine
  113. Siena College/NYT Upshot
  114. Insider Advantage (R) Archived October 21, 2020, at the Wayback Machine
  115. Monmouth University
  116. Data for Progress (D)
  117. YouGov/CBS
  118. Opinion Insight (R)
  119. Civiqs/Daily Kos
  120. Quinnipiac University
  121. Data for Progress (D)
  122. Hart Research Associates (D)
  123. RABA Research
  124. Monmouth University
  125. Siena College/NYT Upshot
  126. Selzer/Des Moines Register
  127. Fabrizio Ward/Hart Research Associates
  128. Opinion Insight (R)
  129. Public Policy Polling
  130. Monmouth University
  131. Data for Progress
  132. RMG Research
  133. Spry Strategies (R)
  134. GQR Research (D)
  135. Selzer/Des Moines Register
  136. Civiqs/Daily Kos
  137. Public Policy Polling (D) Archived November 13, 2020, at the Wayback Machine
  138. Public Policy Polling
  139. Public Policy Polling (D)
  140. 1 2 3 Lake Research Partners (D)
  141. RABA Research/Eddie Mauro
  142. Public Policy Polling
  143. Public Policy Polling (D)
  144. Des Moines Register/Selzer & Co.
  145. 1 2 "General Election – 2020 Canvass Summary" (PDF). Iowa Secretary of State.
  146. "Iowa U.S. Senate Election Results". The New York Times. November 3, 2020. ISSN   0362-4331 . Retrieved October 3, 2021.

Further reading

Official campaign websites