2020 United States Senate election in Colorado

Not to be confused with 2020 Colorado Senate election.

An election was held on November 3, 2020, to elect a member of the United States Senate to represent the State of Colorado, concurrently with the 2020 U.S. presidential election, as well as other elections to the United States Senate, elections to the United States House of Representatives and various state and local elections.

2020 United States Senate election in Colorado

← 2014 November 3, 2020 2026 →

Nominee John Hickenlooper Cory Gardner Party Democratic Republican Popular vote 1,731,114 1,429,492 Percentage 53.50% 44.18%

County results Congressional district results Precinct results Hickenlooper:      40–50%      50–60%      60–70%      70–80%      80–90%      >90% Gardner:      40–50%      50–60%      60–70%      70–80%      80–90%      >90% Tie:      40–50%      No data

U.S. senator before election Cory Gardner Republican Elected U.S. Senator John Hickenlooper Democratic

Under Colorado law, the filing deadline for U.S. Senate candidates was March 17, 2020, the third Tuesday in March of the election year; the primary election occurred on June 30.^[1][2] Incumbent senator Cory Gardner lost re-election to former governor John Hickenlooper.^[3] Gardner was unopposed in the Republican primary, and Hickenlooper defeated former State House Speaker Andrew Romanoff in the Democratic primary.^[4]

This race was one of two Republican-held U.S. Senate seats up for election in 2020 in a state President Trump lost in 2016; the other was in Maine. Many pollsters and pundits^[5][6] considered Gardner to be the most vulnerable Republican senator facing re-election in 2020 due to his narrow victory in 2014, the state's leftward shift, and Trump's unpopularity in the state.

As predicted, Hickenlooper easily defeated Gardner by a 9.3-point margin. However, Gardner did manage to outperform Donald Trump in the concurrent presidential election by roughly four points.^[7] This became the first election Gardner had lost in his political career as well as being the widest margin of loss for a Coloradan U.S. Senator since 1978.^[8] This was the third consecutive election where this seat flipped parties, and also the second consecutive election in which the incumbent senator lost re-election to a second term for this particular seat. At the age of 68, Hickenlooper is the oldest first term senator from Colorado.

Background

Gardner was elected to the U.S. Senate in 2014, narrowly defeating incumbent Democratic senator Mark Udall in a very successful election year for Republicans. Gardner was widely considered vulnerable in 2020 due to Colorado's recent Democratic trend and his support for Trump.^[9] Polling showed that more voters had a negative view of Gardner compared to a positive one.^[10] Gardner also faced a four-year grassroots campaign across the state by progressive political activists to hold him accountable for his votes, featured a cardboard cutout dubbed "Cardboard Cory".^[11] The seat was expected to be highly competitive and the most likely Republican-held seat to flip Democratic. The Democratic nominee, former governor John Hickenlooper, had a consistent double-digit lead over Gardner in the polls.^[12][13]

Various minor scandals in the days leading up to the June 30 Democratic primary sparked speculation that Romanoff might win, but Hickenlooper had an advantage in name recognition, and harsh negative attacks by Romanoff reportedly led many state Democrats and voters to sour on him.^[14]

Republican primary

Candidates

Nominee

• Cory Gardner, incumbent U.S. senator^[15]

Withdrawn

• Margot Dupre, estate agent^[16][17]
• Gail Prentice, veteran and business owner^[18][19]

Endorsements

Cory Gardner (R)

U.S. presidents

• George W. Bush, 43rd president of the United States^[20]
• Donald Trump, 45th president of the United States^[21]

U.S. Executive Branch officials

• Gary L. Bauer, former United States Under Secretary of Education, Assistant to the President for Policy Development, United States Deputy Under Secretary of Education for Planning and Budget, and Member of the United States Commission on International Religious Freedom^[22]
• John Bolton, former United States National Security Advisor^[23]
• Nikki Haley, former United States Ambassador to the United Nations^[24]

Organizations

• Campaign for Working Families^[22]
• Huck PAC^[25]
• Republican Jewish Coalition^[26]

Other individuals

• Charles Koch, billionaire political activist^[27]

Results

Republican primary results^[28]

Party		Candidate	Votes	%
	Republican	Cory Gardner (incumbent)	554,806	100.00%
Total votes			554,806	100.00%

Democratic primary

Candidates

Nominee

• John Hickenlooper, former governor of Colorado and former candidate for president of the United States in 2020^[29]

Eliminated in primary

• Andrew Romanoff, former Speaker of the Colorado House of Representatives, candidate for U.S. Senate in 2010, and nominee for Colorado's 6th congressional district in 2014^[30][31]

Withdrawn

• Dan Baer, former executive director of the Colorado Department of Higher Education and former United States Ambassador to the Organization for Security and Cooperation in Europe^[32] (endorsed John Hickenlooper)
• Derrick Blanton^[33]
• Marcos Boyington, software engineer^[34]
• Diana Bray, psychologist and climate activist^[35] (endorsed Andrew Romanoff)^[36]
• Denise Burgess, businesswoman and Denver Metro Chamber of Commerce board member^[37]
• Ellen Burnes, Colorado State University professor and former chair of the Boulder County Democratic Party^[38]
• Lorena Garcia, community organizer^[a][39]
• David Goldfischer, associate professor at the Korbel School for International Studies at the University of Denver and national security advisor^[40]
• Mike Johnston, former state senator and candidate for Governor of Colorado in 2018^[41]
• Danielle Kombo, medical recruiter and businesswoman^[42] (endorsed Stephany Rose Spaulding)
• Dustin Leitzel, pharmacist^[43][44]
• Alice Madden, former majority leader of the Colorado House of Representatives^[45]
• Christopher Hawkins Critter Milton, 2020 Unity Party nominee for Colorado's 3rd congressional district^[46]
• Keith Pottratz, technician and veteran^[47] (endorsed Lorena Garcia)
• Stephany Rose Spaulding, professor at University of Colorado Colorado Springs and nominee for Colorado's 5th congressional district in 2018^[48] (endorsed Lorena Garcia)^[49]
• Erik Underwood, entrepreneur and candidate for Governor of Colorado in 2018^[50]
• John F. Walsh, former U.S. Attorney for the District of Colorado^[51] (endorsed John Hickenlooper)
• Michelle Ferrigno Warren, nonprofit leader, immigration advocate, first time candidate^[b][52]
• Angela Williams, state senator (ran for re-election)^[53]
• Trish Zornio, biomedical scientist^[30][54] (endorsed John Hickenlooper)

Declined

• Diana DeGette, incumbent U.S. Representative (ran for re-election)^[55]
• Kerry Donovan, state senator^[56] (endorsed John Hickenlooper)
• Crisanta Duran, former speaker of the Colorado House of Representatives (ran for Colorado's 1st congressional district,^[57] then withdrew)
• Jena Griswold, Colorado Secretary of State^[58]
• Cary Kennedy, former Colorado State Treasurer^[59]
• Joe Neguse, incumbent U.S. representative for Colorado's 2nd congressional district (ran for re-election)^{[30][60][61][62]}
• Ed Perlmutter, incumbent U.S. representative for Colorado's 7th congressional district^[34] (endorsed John Hickenlooper)
• Joe Salazar, former state representative^[59]

Endorsements

John Hickenlooper

U.S. presidents

• Barack Obama, 44th president of the United States^[20]

Former U.S. Executive Branch officials

• Ken Salazar, former U.S. Interior Secretary and former U.S. senator (CO)^[63]

U.S senators

• Kamala Harris, 2020 vice presidential nominee, United States Senator from California (2017–2021)^[64]
• Amy Klobuchar, senator for Minnesota (2007–present), former 2020 presidential candidate.^[65]
• Elizabeth Warren, U.S. senator from Massachusetts (2013–present), former 2020 presidential candidate^[66]

U.S. representatives

• Ed Perlmutter, U.S. representative (CO)^[67]

State officials

• Roy Romer, former governor of Colorado^[68]

Local officials

• Brianna Buentello, state representative^[69]
• Leroy Garcia, president of the Colorado Senate^[70]
• Dylan Roberts, state representative^[69]

Newspapers

• The Durango Herald^[71]

Organizations

• 314 Action^[72]
• Bend the Arc: Jewish Action^[73]
• Congressional Black Caucus PAC^[74]
• Congressional Hispanic Caucus^[75]
• Council for a Livable World^[76]
• Democratic Majority for Israel PAC^[77]
• End Citizens United^[78]
• Everytown for Gun Safety^[79]
• Feminist Majority PAC^[80]
• Giffords^[81]
• J Street^[82]
• Joint Action Committee for Political Affairs^[83]
• League of Conservation Voters^[84]
• Let America Vote^[78]
• NARAL Pro-Choice America^[85]
• National Committee to Preserve Social Security and Medicare^[86]
• Sierra Club^[87]
• Students for Gun Legislation

Andrew Romanoff

State officials

• Peter Groff, former Colorado State Senate president and state representative^[88]
• Polly Baca, former state senator and state representative^[88]

Individuals

• Bill McKibben, environmentalist, lecturer, and founder of 350.org^[89]
• Marianne Williamson, author, former candidate for California's 33rd congressional district, former 2020 presidential candidate^[90]

Newspapers

• Sentinel Colorado^[91]

Organizations

• Climate Hawks Vote^[92]
• Our Revolution^[93]
• Progressive Democrats of America^[94]
• Sunrise Movement^[95]

Polling

Poll source	Date(s) administered	Sample size[c]	Margin of error	Jena Griswold	John Hickenlooper	Mike Johnston	Andrew Romanoff	Other / Undecided
SurveyUSA[96]	June 19–24, 2020	575 (LV)	± 6.0%	–	58%	–	28%	15%[d]
Myers Research and Strategic Services[97][A]	June 16–17, 2020	500 (LV)	± 4.4%	–	51%	–	39%	–
Unspecified polling firm[98][A]	October 2019	– (LV)[e]	–	–	68%	–	19%	–
	September 3, 2019	Johnston withdraws from the race
Public Policy Polling (D)[99][B]	August 28–29, 2019	509 (LV)	–	–	60%[f]	3%	9%	27%[g]
				–[h]	66%	–	17%	17%[i]
	August 21, 2019	Hickenlooper announces his candidacy
	August 9, 2019	Griswold announces that she will not run
Garin-Hart-Yang Research Group[100]	July 25–28, 2019	600 (LV)	–	6%	61%	10%	8%	15%[d]
Public Policy Polling (D)[101]	July 12–14, 2019	561 (LV)	–	4%	44%	3%	12%	38%[j]

Hypothetical polling

with Dan Baer and John Hickenlooper Poll source Date(s) administered Sample size[c] Margin of error Dan Baer John Hickenlooper Undecided Public Policy Polling (D)[99][B] August 28–29, 2019 509 (LV) – 11% 72% 17% with John Hickenlooper and Mike Johnston Poll source Date(s) administered Sample size[c] Margin of error John Hickenlooper Mike Johnston Undecided Public Policy Polling (D)[99][B] August 28–29, 2019 509 (LV) – 69% 14% 18% with John Hickenlooper and Alice Madden Poll source Date(s) administered Sample size[c] Margin of error John Hickenlooper Alice Madden Undecided Public Policy Polling (D)[99][B] August 28–29, 2019 509 (LV) – 69% 14% 17% with John Hickenlooper and Angela Williams Poll source Date(s) administered Sample size[c] Margin of error John Hickenlooper Angela Williams Undecided Public Policy Polling (D)[99][B] August 28–29, 2019 509 (LV) – 70% 11% 18%

Caucus

On March 7, 2020, the Colorado Democratic Party held a non-binding Senate primary preference poll at its caucus sites. Attendees could choose delegates to county and then state conventions. If a candidate received at least 30% of the delegates at the state convention they would be placed on the ballot. Some candidates were not listed because they instead chose to attempt to collect signatures to reach the ballot. Candidates needed 1,500 signatures from each congressional district. Hickenlooper and Underwood chose to do both. Romanoff collected the needed signatures as of March 8, 2020.^[102][103]

Caucus results

Romanoff was the only candidate to get more than 30% in the initial precinct caucuses. Hickenlooper withdrew from the assembly process soon afterward, choosing to qualify for the ballot exclusively by petition. Ballot access for assembly candidates will be decided at the state assembly. Caucus winners do not always receive the party's nomination; Romanoff won them in the 2010 Democratic primary for Colorado's Senate race, but Michael Bennet won the party's nomination that year.^[104]

The aggregate results of the various precinct caucuses on March 7, 2020, were:^[105]

Candidate	Total raw votes	Percentage of vote won (%)
Andrew Romanoff	8,629	54.98
John Hickenlooper	4,761	30.34
Trish Zornio	976	6.21
Stephany Rose Spaulding	771	4.91
Uncommitted	520	3.31
Erik Underwood	35	0.22

Results

Results by county:

Hickenlooper

•   50–60%
    60–70%
    70–80%

Romanoff

•   50–60%

Democratic primary results^[106]

Party		Candidate	Votes	%
	Democratic	John Hickenlooper	585,826	58.65%
	Democratic	Andrew Romanoff	412,955	41.35%
Total votes			998,781	100.00%

Other candidates

Libertarian primary

Nominee

• Raymon Doane, Libertarian nominee for Colorado's 1st congressional district in 2018^[107]

Eliminated in primary

• Gaylon Kent, author and perennial candidate^[108]

Results

Libertarian primary results^[109]

Party		Candidate	Votes	%
	Libertarian	Raymon Doane	3,477	62.41%
	Libertarian	Gaylon Kent	2,094	37.59%
Total votes			5,571	100.00%

Unity Party

Nominee

• Stephan "Chairman Seku" Evans, former candidate for mayor of Denver^[110]

Eliminated at Unity Party convention

• Joshua Rodriguez^[111]

Withdrawn

• Gary Swing, perennial candidate^[112][110]

Write-in candidates

Declared

• Dan Doyle (Approval Voting Party)^[113]
• Bruce Lohmiller (Green Party)^[113]
• Theodore Rockwell, Steamboat Springs (independent)^[113]
• Michael Sanchez (independent)^[113]
• Danny Skelly, small business owner (independent)^[113]

Withdrawn

• Veronique Bellamy, former candidate for RTD board (Socialist Party)^{[110][114][115]}
• Joseph "Joey" Camp, performance artist (independent)^{[116][110][113]}
• Lisa Garcia (independent)^[117][113]
• Christopher K. Springer (independent)^[118][113]
• Donald George Willoughby (independent)^[118][113]
• Marti Wolf (independent)^[118][113]

General election

Debate

Host	Date & time	Link(s)	Participants
			John Hickenlooper	Cory Gardner
Colorado State University	October 13, 2020 6:00pm MDT	[119]	Present	Present

Predictions

Source	Ranking	As of
The Cook Political Report[120]	Lean D (flip)	October 29, 2020
Inside Elections[121]	Lean D (flip)	October 28, 2020
Sabato's Crystal Ball[122]	Likely D (flip)	November 2, 2020
Daily Kos[123]	Likely D (flip)	October 30, 2020
Politico[124]	Lean D (flip)	November 2, 2020
RCP[125]	Lean D (flip)	October 23, 2020
DDHQ[126]	Likely D (flip)	November 3, 2020
538[127]	Likely D (flip)	November 2, 2020
Economist[128]	Likely D (flip)	November 2, 2020

Post-primary endorsements

Cory Gardner (R)

Organizations

• Citizens for Responsible Energy Solutions^[129]
• Susan B. Anthony List^[129]
• Tea Party Express^[129]

Newspapers

• The Gazette^[130]

John Hickenlooper (D)

U.S senators

• Michael Bennet, U.S. senator from Colorado (2009–present), former 2020 presidential candidate^[131]

Unions

• International Federation of Professional and Technical Engineers^[132]
• National Education Association^[133]
• SEIU Local 105^[134]
• United Auto Workers^[135]
• United Farm Workers^[134]

Organizations

• Black Economic Alliance^[136]
• Greater Metro Denver Ministerial Alliance^[137]
• Humane Society of the United States Legislative Fund^[138]
• MoveOn^[139]
• Natural Resources Defense Council Action Fund^[140]
• Population Connection^[141]

Polling

Graphical Summary

Poll Results

Poll source	Date(s) administered	Sample size[c]	Margin of error	Cory Gardner (R)	John Hickenlooper (D)	Other / Undecided
Keating Research/Onsight Public Affairs/Colorado Sun[142]	October 29 – November 1, 2020	502 (LV)[k]	± 4.4%	42%	53%	–
Data for Progress[143]	October 27 – November 1, 2020	709 (LV)	± 3.7%	45%	54%	2%[l]
Swayable[144]	October 23 – November 1, 2020	443 (LV)	± 6%	43%	57%	–
Morning Consult[145]	October 22–31, 2020	727 (LV)	± 4%	44%	52%	–
Morning Consult[145]	October 11–20, 2020	788 (LV)	± 3.5%	42%	50%	–
RBI Strategies & Research[146]	October 12–16, 2020	502 (LV)	± 4.4%	39%	53%	7%[m]
RMG Research/PoliticalIQ[147]	October 9–15, 2020	800 (LV)	± 3.5%	42%	51%	7%[n]
Civiqs/Daily Kos[148]	October 11–14, 2020	1,013 (LV)	± 3.6%	42%	53%	3%[o]
Keating Research/OnSight Public Affairs/Melanson[149]	October 8–13, 2020	519 (LV)	± 4.3%	41%	51%	7%[p]
Morning Consult[145]	October 2–11, 2020	837 (LV)	± 3.4%	40%	50%	–
YouGov/University of Colorado[150]	October 5–9, 2020	800 (LV)	± 4.64%	40%	48%	12%[q]
SurveyUSA[151]	October 1–6, 2020	1,021 (LV)	± 3.9%	39%	48%	14%[r]
Morning Consult[152]	September 11–20, 2020	613 (LV)	± (2% – 7%)	42%[s]	49%	–
Morning Consult[153]	September 8–17, 2020	599 (LV)[k]	± (2% – 4%)	44%	46%	–
Fabrizio Ward/Hart Research Associates[154][C]	August 30 – September 5, 2020	800 (LV)	± 3.5%	46%	51%	4%[t]
Global Strategy Group (D)[155][D]	August 28 – September 1, 2020	800 (LV)	± 3.5%	42%	52%	5%
Morning Consult[156]	August 21–30, 2020	638 (LV)	± 4.0%	39%[s]	48%	13%
Morning Consult[156]	August 16–25, 2020	≈600 (LV)	± 4.0%	39%	48%	–
Public Policy Polling (D)[157][E]	August 18–19, 2020	731 (V)	± 3.2%	42%	51%	7%[u]
Morning Consult[156]	August 6–15, 2020	≈600 (LV)	± 4.0%	38%	49%	–
Morning Consult[156]	July 27 – August 5, 2020	≈600 (LV)	± 4.0%	39%	50%	–
Morning Consult[158]	July 17–26, 2020	616 (LV)	± 4.0%	42%[v]	48%	11%[w]
Morning Consult[156]	July 13–22, 2020	≈600 (LV)	± 4.0%	41%	50%	–
Public Policy Polling[159][F]	June 29–30, 2020	840 (V)	± 3.4%	40%	51%	9%[x]
Keating Research/OnSight Public Affairs/Melanson[160]	May 1–3, 2020	600 (LV)	± 4.0%	36%	54%	10%[y]
Montana State University Bozeman[161]	April 10–19, 2020	379 (LV)	± 4.4%	31%	48%	21%[z]
Keating Research[162]	October 10–14, 2019	500 (LV)	± 4.4%	42%	53%	5%
Emerson College[163]	August 16–19, 2019	1,000 (RV)	± 3.0%	40%	53%	8%
Global Strategy Group (D)[164][G]	August 13–14, 2019	617 (LV)	± 3.9%	39%	49%	13%
Public Policy Polling[165][B]	August 8–11, 2019	739 (V)	± 3.6%	38%	51%	12%

Hypothetical polling

with generic Democrat

Poll source	Date(s) administered	Sample size[c]	Margin of error	Cory Gardner (R)	Generic Democrat	Other / Undecided
Global Strategy Group (D)[164][G]	August 13–14, 2019	617 (LV)	± 3.9%	38%	48%	14%
Global Strategy Group[166]	January 31 – February 4, 2019	818 (RV)	± 3.4%	40%	51%	9%
DFM Research[167]	January 2–5, 2019	550 (A)	± 4.2%	38%	46%	16%
Change Research (D)[168][H]	December 2–4, 2018	540 (LV)	± 4.2%	41%	47%	–
Public Policy Polling (D)[169][I]	August 2–3, 2017	628 (V)	± 3.8%	41%	46%	13%
Public Policy Polling (D)[170][J]	June 30 – July 1, 2017	870 (V)	± 3.6%	39%	53%	8%

on whether Cory Gardner deserves to be re-elected

Poll source	Date(s) administered	Sample size[c]	Margin of error	Yes	No	Other / Undecided
Fabrizio Ward/AARP[171]	July 29–31, 2019	600 (LV)	± 4.0%	32%	50%	19%[aa]

with Generic Republican and Generic Democrat

Poll source	Date(s) administered	Sample size[c]	Margin of error	Generic Republican	Generic Democrat	Other / Undecided
YouGov/University of Colorado[150]	October 5–9, 2020	800 (LV)	± 4.64%	39%	47%	14%[ab]
Climate Nexus[172]	February 15–19, 2020	485 (RV)	± 4.5%	40%	48%	12%[ac]
Fabrizio Ward/AARP[171]	July 29–31, 2019	600 (LV)	± 4.0%	42%	44%	14%[ad]

with Mike Johnston

Poll source	Date(s) administered	Sample size[c]	Margin of error	Cory Gardner (R)	Mike Johnston (D)	Other	Undecided
Global Strategy Group (D)[164][G]	August 13–14, 2019	617 (LV)	± 3.9%	39%	50%	–	11%
Fabrizio Ward/AARP[171]	July 29–31, 2019	600 (LV)	± 4.0%	45%	39%	2%[ae]	14%

Results

The election was not particularly close, with Hickenlooper winning by 9.32%. Hickenlooper's win was expected, as Colorado has moved more toward being a blue state. Key to Hickenlooper's victory was Denver County and its surrounding suburban counties, Adams, Arapahoe, Boulder, and Jefferson, the latter of which had been pivotal to Gardner's victory in 2014.^{[citation needed]} Gardner did well in the typically red El Paso County, home of Colorado Springs. Gardner also did well in many rural areas of the state. However, Hickenlooper's strong performance in heavily populated counties proved too much for Gardner to overcome. Hickenlooper was also likely helped by Joe Biden, who won the state by 13.5%.

Hickenlooper is the first senator from Colorado who was also the Governor of Colorado since Senator Edwin Johnson was elected in 1936. Hickenlooper was sworn in as Senator on January 3, 2021, for a six-year term that expires on January 3, 2027.

United States Senate election in Colorado, 2020^[173][174]

Party		Candidate	Votes	%	±%
	Democratic	John Hickenlooper	1,731,114	53.50%	+7.24%
	Republican	Cory Gardner (incumbent)	1,429,492	44.18%	−4.03%
	Libertarian	Raymon Doane	56,262	1.74%	−0.85%
	Approval Voting	Daniel Doyle	9,820	0.30%	N/A
	Unity	Stephen Evans	8,971	0.28%	−0.04%
Total votes			3,235,659	100.00%	N/A
	Democratic gain from Republican

By county

By county

County[175] John Hickenlooper Democratic Cory Gardner Republican Raymon Doane Libertarian Daniel Doyle Approval Voting Stephen Evans Unity Margin Total votes # % # % # % # % # % # % Adams 130,409 55.33 98,341 41.72 4,916 2.09 1,071 0.45 963 0.41 32,068 13.60 235,700 Alamosa 3,734 48.45 3,800 49.31 104 1.35 40 0.52 29 0.38 -66 -0.86 7,707 Arapahoe 204,054 58.53 136,713 39.21 5,694 1.63 1,074 0.31 1,111 0.32 67,341 19.31 348,646 Archuleta 3,591 39.82 5,225 57.93 163 1.81 26 0.29 14 0.16 -1,634 -18.12 9,019 Baca 329 14.98 1,816 82.70 32 1.46 12 0.55 7 0.32 -1,487 -67.71 2,196 Bent 702 31.12 1,488 65.96 33 1.46 26 1.15 7 0.31 -786 -34.84 2,256 Boulder 154,552 75.20 47,321 23.03 2,869 1.40 317 0.15 457 0.22 107,231 52.18 205,516 Broomfield 27,447 59.41 17,855 38.65 712 1.54 82 0.18 100 0.22 9,592 20.76 46,196 Chaffee 6,948 51.17 6,344 46.72 232 1.71 32 0.24 22 0.16 604 4.45 13,578 Cheyenne 119 10.58 995 88.44 7 0.62 2 0.18 2 0.18 -876 -77.87 1,125 Clear Creek 3,494 53.94 2,835 43.77 121 1.87 15 0.23 12 0.19 659 10.17 6,477 Conejos 1,975 46.26 2,243 52.54 24 0.56 18 0.42 9 0.21 -268 -6.28 4,269 Costilla 1,313 62.91 713 34.16 40 1.92 12 0.57 9 0.43 600 28.75 2,087 Crowley 456 26.19 1,230 70.65 36 2.07 12 0.69 7 0.40 -774 -44.46 1,741 Custer 1,059 29.47 2,456 68.34 62 1.73 10 0.28 7 0.19 -1,397 -38.87 3,594 Delta 5,764 29.86 13,118 67.96 308 1.60 79 0.41 34 0.18 -7,354 -38.10 19,303 Denver 305,602 77.74 80,163 20.39 4,984 1.27 963 0.24 1,376 0.35 225,439 57.35 393,088 Dolores 338 23.69 1,064 74.56 17 1.19 4 0.28 4 0.28 -726 -50.88 1,427 Douglas 97,553 42.13 130,045 56.16 3,279 1.42 332 0.14 350 0.15 -32,492 -14.03 231,559 Eagle 17,902 62.27 10,350 36.00 384 1.34 53 0.18 59 0.21 7,552 26.27 28,748 El Paso 152,126 40.36 212,057 56.27 9,932 2.64 1,451 0.39 1,314 0.35 -59,931 -15.90 376,880 Elbert 4,257 22.46 14,340 75.64 299 1.58 35 0.18 26 0.14 -10,083 -53.19 18,957 Fremont 7,201 28.40 17,450 68.81 508 2.00 129 0.51 71 0.28 -10,249 -40.42 25,359 Garfield 14,999 48.72 15,027 48.81 598 1.94 92 0.30 71 0.23 -28 -0.09 30,787 Gilpin 2,183 52.29 1,867 44.72 99 2.37 15 0.36 11 0.26 316 7.57 4,175 Grand 4,579 46.36 5,075 51.38 181 1.83 28 0.28 15 0.15 -496 -5.02 9,878 Gunnison 6,922 62.13 3,978 35.71 193 1.73 30 0.27 18 0.16 2,944 26.42 11,141 Hinsdale 244 39.35 365 58.87 9 1.45 0 0.00 2 0.32 -121 -19.52 620 Huerfano 2,077 47.52 2,160 49.42 97 2.22 25 0.57 12 0.27 -83 -1.90 4,371 Jackson 164 18.92 684 78.89 12 1.38 5 0.58 2 0.23 -520 -59.98 867 Jefferson 210,619 55.87 158,276 41.99 6,191 1.64 1,026 0.27 849 0.23 52,343 13.88 376,961 Kiowa 93 10.45 783 87.98 10 1.12 3 0.34 1 0.11 -690 -77.53 890 Kit Carson 628 16.46 3,138 82.25 36 0.94 8 0.21 5 0.13 -2,510 -65.79 3,815 La Plata 19,873 56.05 14,776 41.68 632 1.78 71 0.20 101 0.28 5,097 14.38 35,453 Lake 2,297 58.11 1,511 38.22 109 2.76 15 0.38 21 0.53 786 19.88 3,953 Larimer 116,419 53.91 94,585 43.80 3,914 1.81 544 0.25 471 0.22 21,834 10.11 215,933 Las Animas 3,509 44.28 4,217 53.21 130 1.64 45 0.57 24 0.30 -708 -8.93 7,925 Lincoln 434 16.46 2,141 81.22 39 1.48 17 0.64 5 0.19 -1,707 -64.76 2,636 Logan 2,117 20.20 8,167 77.92 131 1.25 37 0.35 29 0.28 -6,050 -57.72 10,481 Mesa 29,478 33.05 57,236 64.17 1,785 2.00 457 0.51 244 0.27 -27,758 -31.12 89,200 Mineral 302 39.89 437 57.73 15 1.98 1 0.13 2 0.26 -135 -17.83 757 Moffat 1,120 16.45 5,544 81.41 106 1.56 31 0.46 9 0.13 -4,424 -64.96 6,810 Montezuma 5,538 36.45 9,273 61.03 272 1.79 47 0.31 64 0.42 -3,735 -24.58 15,194 Montrose 7,321 29.45 16,978 68.31 410 1.65 92 0.37 55 0.22 -9,657 -38.85 24,856 Morgan 3,787 27.91 9,544 70.33 136 1.00 69 0.51 35 0.26 -5,757 -42.42 13,571 Otero 3,428 36.60 5,731 61.18 113 1.21 67 0.72 28 0.30 -2,303 -24.59 9,367 Ouray 2,291 57.45 1,622 40.67 68 1.71 3 0.08 4 0.10 669 16.77 3,988 Park 4,800 39.20 7,100 57.98 281 2.29 31 0.25 34 0.28 -2,300 -18.78 12,246 Phillips 463 18.74 1,980 80.13 22 0.89 6 0.24 0 0.00 -1,517 -61.39 2,471 Pitkin 8,761 73.88 2,935 24.75 130 1.10 13 0.11 20 0.17 5,826 49.13 11,859 Prowers 1,435 26.09 3,966 72.11 55 1.00 26 0.47 18 0.33 -2,531 -46.02 5,500 Pueblo 42,791 48.93 42,098 48.14 1,720 1.97 533 0.61 308 0.35 693 0.79 87,450 Rio Blanco 529 14.47 3,065 83.86 46 1.26 13 0.36 2 0.05 -2,536 -69.38 3,655 Rio Grande 2,502 39.85 3,635 57.89 84 1.34 40 0.64 18 0.29 -1,133 -18.04 6,279 Routt 10,284 61.12 6,256 37.18 223 1.33 39 0.23 24 0.14 4,028 23.94 16,826 Saguache 1,887 55.84 1,405 41.58 55 1.63 11 0.33 21 0.62 482 14.26 3,379 San Juan 328 59.64 207 37.64 10 1.82 2 0.36 3 0.55 121 22.00 550 San Miguel 3,808 74.36 1,227 23.96 76 1.48 2 0.04 8 0.16 2,581 50.40 5,121 Sedgwick 320 22.11 1,103 76.23 14 0.97 9 0.62 1 0.07 -783 -54.11 1,447 Summit 12,175 66.14 5,817 31.60 353 1.92 25 0.14 37 0.20 6,358 34.54 18,407 Teller 5,039 30.06 11,307 67.46 339 2.02 54 0.32 22 0.13 -6,268 -37.40 16,761 Washington 346 11.55 2,617 87.35 22 0.73 4 0.13 7 0.23 -2,271 -75.80 2,996 Weld 63,647 38.19 99,424 59.65 2,761 1.66 470 0.28 376 0.23 -35,777 -21.46 166,678 Yuma 652 13.10 4,273 85.85 29 0.58 19 0.38 4 0.08 -3,621 -72.75 4,977 Totals 1,731,114 53.50 1,429,492 44.18 56,262 1.74 9,820 0.30 8,971 0.28 301,622 9.32 3,235,659 Counties that flipped from Republican to Democratic Chaffee (largest municipality: Salida) Larimer (largest municipality: Fort Collins) Counties that flipped from Democratic to Republican Alamosa (largest municipality: Alamosa) Huerfano (largest municipality: Walsenburg)

Margin swing by county

Legend

•   Republican — +12.5–15%
•   Republican — +10−12.5%
•   Republican — +7.5–10%
•   Republican — +5−7.5%
•   Republican — +2.5−5%
•   Republican — +0−2.5%
•   Democratic — +0−2.5%
•   Democratic — +2.5−5%
•   Democratic — +5−7.5%
•   Democratic — +7.5–10%
•   Democratic — +10−12.5%
•   Democratic — +12.5–15%
•   Democratic — >15%

By congressional district

Hickenlooper won four of seven congressional districts.^[176]

District	Gardner	Hickenlooper	Representative
1st	24%	74%	Diana DeGette
2nd	36%	62%	Joe Neguse
3rd	52%	45%	Scott Tipton
			Lauren Boebert
4th	59%	39%	Ken Buck
5th	57%	40%	Doug Lamborn
6th	42%	56%	Jason Crow
7th	39%	58%	Ed Perlmutter

See also

• 2020 Colorado elections
• 2020 United States Senate elections

Notes

Partisan clients

1. Poll sponsored by Romanoff's campaign
2. Poll sponsored by 314 Action
3. Poll sponsored by AARP.
4. Poll sponsored by Progress Colorado, a progressive and pro-Affordable Care Act organization.
5. Giffords endorsed Hickenlooper prior to this poll's sampling period
6. End Citizens United supports candidates who oppose the landmark Citizens United Supreme Court ruling
7. Poll conducted for Mike Johnston
8. Poll sponsored by ProgressNow Colorado
9. Poll sponsored by Our Lives on the Line
10. Poll sponsored by Save My Care, a pro-Affordable Care Act organization

Voter samples

1. A judge ruled that Lorena Garcia could appear on the ballot despite only getting 50% of the signatures needed to qualify, citing how signatures can't be collected due to COVID-19. The Colorado Supreme Court overruled the ruling after an appeal from Colorado's Secretary of State.
2. A judge ruled that Michelle Ferrigno Warren could appear on the ballot despite only getting 50% of the signatures needed to qualify, citing how signatures can't be collected due to COVID-19. The Colorado Supreme Court overruled the ruling after an appeal from Colorado's Secretary of State.
3. Key:
   A – all adults
   RV – registered voters
   LV – likely voters
   V – unclear
4. Undecided with 15%
5. Not yet released
6. Standard VI response
7. Undecided with 16%; Baer, Madden and Williams with 2%; Walsh with 1%; "someone else" with 4%
8. With only Hickenlooper and Romanoff as candidates
9. Undecided with 17%
10. Undecided with 29%; Walsh with 4%; Williams with 3%; Baer and Madden with 1%
11. Additional data sourced from FiveThirtyEight
12. "Other candidate or write-in" with 2%
13. Doane (L) with 2%; Evans (Unity) with 1%; Undecided with 4%
14. "Some other candidate" with 3%; Undecided with 4%
15. Doane (L) with 2%; Doyle (Approval Voting), Evans (Unity) and "Someone else" with 0%; Undecided with 1%
16. "Other candidate" with 3%; Undecided with 4%
17. "Other" with 1%; Undecided with 11%
18. "Some other candidate" with 6%; Undecided with 8%
19. Overlapping sample with the previous Morning Consult poll, but more information available regarding sample size
20. Would not vote with 1%; Undecided with 3%
21. Undecided with 7%
22. Overlapping sample with the previous Morning Consult poll, but more information available regarding sample size and voters who are undecided or for third party candidates
23. "Someone else" with 5%; Undecided with 6%
24. Undecided with 9%
25. Undecided with 9%; "Another candidate" with 1%
26. "Don't know" with 17%; "other/none of the above" with 4%
27. "Refused" with 3%; Undecided with 16%
28. "Other" with 2%; Undecided with 12%
29. "Neither candidate or other candidate" with 12%
30. "Undecided" with 10%; "don't know/refused" with 4%
31. Would not vote/would not vote for U.S. Senate with 2%