# 2020 United States Senate election in Wyoming

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The 2020 United States Senate election in Wyoming was held on November 3, 2020, to elect a member of the United States Senate to represent the State of Wyoming, 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. Cynthia Lummis defeated Democrat Merav Ben-David by more than 46 percentage points, becoming the first female U.S. Senator from Wyoming and succeeding fellow Republican Mike Enzi, who did not run for reelection. This was the first open Senate seat since 1996, when Enzi was first elected. The Democratic and Republican party primary elections were held on August 18, 2020. This was the first time since 1996 that Democrats won any county for this seat. Enzi died aged 77 on July 26, 2021, from injuries in a bicycle accident, less than seven months after his retirement from the Senate.
Cynthia Lummis won the election with 72.85% of the popular vote, winning 2.91% more than President Donald Trump had won in the concurrent presidential election in the state.

## Republican primary
### Candidates
#### Nominee

* Cynthia Lummis, former U.S. representative for Wyoming's at-large congressional district and former Treasurer of Wyoming

#### Eliminated in primary

* R. Mark Armstrong, geologist
* Devon Cade, businessman
* John Holtz, attorney and U.S. Air Force veteran
* Michael Kemler
* Bryan Miller, candidate for U.S. Senate in 2014
* Donna Rice, estate lawyer
* Star Roselli, conspiracy theorist
* Robert Short, Converse County commissioner and businessman
* Joshua Wheeler, Wyoming Army National Guard veteran

#### Withdrawn

* Patrick Dotson, retiree
* Rolland Holthus

#### Declined

* Liz Cheney, incumbent U.S. representative for Wyoming's at-large congressional district, Chair of House Republican Conference, and daughter of the 46th Vice President Dick Cheney (running for re-election)
* Mike Enzi, incumbent U.S. senator (endorsed Cynthia Lummis)
* Foster Friess, businessman and former governor candidate
* Robert Grady, policy adviser to former president George H. W. Bush
* Matt Mead, former governor of Wyoming
* Donald Trump Jr., businessman and son of President of the United States Donald Trump

### Endorsements

U.S. senators
* John Barrasso, U.S. senator (WY)
* Bill Cassidy, U.S. senator (LA)
* Ted Cruz, U.S. senator (TX) and candidate for President in 2016
* Mike Enzi, U.S. senator (WY)
* Mike Lee, U.S. senator (UT)
* Rand Paul, U.S. senator (KY) and candidate for President in 2016
U. S. Representatives
* Michele Bachmann, former U.S. representative (MN) and 2012 presidential candidate
* Jason Chaffetz, former U.S. representative (UT)
* Mark Meadows, former U.S. representative (R-NC) and White House Chief of Staff
Organizations
* Citizens United
* Club for Growth
* Concerned Women for America
* Gun Owners of America
* NRA Political Victory Fund
* Senate Conservatives Fund
* Students for Trump
* United States Chamber of Commerce
Individuals
* Foster Friess, businessman and 2018 Wyoming gubernatorial election candidate

### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Mark Armstrong | Jillian Ballow | Liz Cheney | Foster Friess | Cynthia Lummis | Undecided |
| | January 16, 2020 | Cheney announces she will not run | Cheney announces she will not run | Cheney announces she will not run | Cheney announces she will not run | Cheney announces she will not run | Cheney announces she will not run | Cheney announces she will not run | Cheney announces she will not run |
| The Tarrance Group (R) | June 22–24, 2019 | 502 (LV) | ± 4.5% | – | – | 56% | – | 34% | – |

### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Cynthia Lummis | 63,511 | 59.67% |
| | Republican | Robert Short | 13,473 | 12.66% |
| | Republican | Bryan Miller | 10,946 | 10.28% |
| | Republican | Donna Rice | 5,881 | 5.53% |
| | Republican | R. Mark Armstrong | 3,904 | 3.67% |
| | Republican | Joshua Wheeler | 3,763 | 3.53% |
| | Republican | John Holtz | 1,820 | 1.71% |
| | Republican | Devon Cade | 1,027 | 0.96% |
| | Republican | Michael Kemler | 985 | 0.93% |
| | Republican | Star Roselli | 627 | 0.59% |
| | Republican | Write-ins | 501 | 0.47% |
| Total votes | Total votes | Total votes | 106,438 | 100.00% |

## Democratic primary
### Candidates
#### Nominee

* Merav Ben-David, Chair of the Department of Zoology and Physiology at the University of Wyoming and wildlife ecologist

#### Eliminated in primary

* Kenneth R. Casner, Democratic candidate for the 2018 Wyoming gubernatorial election and Democratic nominee for District 47 of the Wyoming House of Representatives in 2016
* James DeBrine, progressive activist
* Yana Ludwig, democratic socialist activist and community organizer
* Nathan Wendt, think tank executive, management consultant, businessman, entrepreneur
* Rex Wilde, veteran, service technician, Democratic candidate for the 2018 Wyoming gubernatorial election and Democratic candidate for the 2014 United States Senate election in Wyoming

#### Withdrawn

* Chuck Jagoda, teacher

### Endorsements

Local officials
* Gary Trauner, member of the Teton County School District Number 1 Board of Trustees (2006–2008) and businessman
Individuals
* Jason Shogren, Department Chair in the Department of Economics at the University of Wyoming
Organizations
* Retake the Senate 2020
* We the People
* Women to Win
U.S. senators
* Tammy Duckworth, U.S. senator from Illinois (2017–present), U.S. Representative from Illinois's 8th congressional district (2013–2017), Assistant Secretary of Veterans Affairs for Public and Intergovernmental Affairs (2009–2011), Director of the Illinois Department of Veterans Affairs (2006–2009)
U.S. Ambassadors
* Richard Newton Holwill, American Ambassador Extraordinary and Plenipotentiary to Ecuador (1988–1989)
Local officials
* Pete Muldoon, Mayor of Jackson, Wyoming
Organizations
* Democratic Socialists of America - Southeast Wyoming chapter
* Our Revolution - Casper chapter

### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Merav Ben-David | 9,584 | 40.28% |
| | Democratic | Yana Ludwig | 4,931 | 20.73% |
| | Democratic | Nathan Wendt | 4,212 | 17.70% |
| | Democratic | Kenneth Casner | 2,139 | 8.99% |
| | Democratic | Rex Wilde | 1,888 | 7.93% |
| | Democratic | James DeBrine | 865 | 3.64% |
| | Democratic | Write-ins | 173 | 0.73% |
| Total votes | Total votes | Total votes | 23,792 | 100.00% |
By county :
| | Merav Ben-David | Merav Ben-David | Yana Ludwig | Yana Ludwig | Nathan Wendt | Nathan Wendt | Kenneth Casner | Kenneth Casner | Rex Wilde | Rex Wilde | James DeBrine | James DeBrine | Total |
| County | Votes | % | Votes | % | Votes | % | Votes | % | Votes | % | Votes | % | Votes |
| Albany | 1,867 | 56.07% | 809 | 24.29% | 314 | 9.43% | 187 | 5.62% | 84 | 2.52% | 69 | 2.07% | 3,330 |
| Big Horn | 84 | 38.71% | 49 | 22.58% | 42 | 19.35% | 18 | 8.29% | 17 | 7.83% | 7 | 3.23% | 217 |
| Campbell | 144 | 31.51% | 114 | 24.95% | 105 | 22.98% | 37 | 8.10% | 35 | 7.66% | 22 | 4.81% | 457 |
| Carbon | 199 | 32.36% | 110 | 17.89% | 86 | 13.98% | 138 | 22.44% | 43 | 6.99% | 39 | 6.34% | 615 |
| Converse | 78 | 32.37% | 53 | 21.99% | 38 | 15.77% | 36 | 14.94% | 19 | 7.88% | 17 | 7.05% | 241 |
| Crook | 43 | 39.45% | 22 | 20.18% | 19 | 17.43% | 11 | 10.09% | 7 | 6.42% | 7 | 6.42% | 109 |
| Fremont | 831 | 42.81% | 424 | 21.84% | 296 | 15.25% | 155 | 7.99% | 145 | 7.47% | 90 | 4.64% | 1,941 |
| Goshen | 148 | 36.63% | 109 | 26.98% | 66 | 16.34% | 37 | 9.16% | 27 | 6.68% | 17 | 4.21% | 404 |
| Hot Springs | 81 | 52.26% | 27 | 17.42% | 13 | 8.39% | 11 | 7.10% | 17 | 10.97% | 6 | 3.87% | 155 |
| Johnson | 99 | 51.03% | 32 | 16.49% | 36 | 18.56% | 15 | 7.73% | 7 | 3.61% | 5 | 2.58% | 194 |
| Laramie | 1,808 | 36.02% | 942 | 18.76% | 800 | 15.94% | 712 | 14.18% | 556 | 11.08% | 202 | 4.02% | 5,020 |
| Lincoln | 146 | 37.73% | 75 | 19.38% | 83 | 21.45% | 27 | 6.98% | 47 | 12.14% | 9 | 2.33% | 387 |
| Natrona | 933 | 38.68% | 527 | 21.85% | 436 | 18.08% | 278 | 11.53% | 142 | 5.89% | 96 | 3.98% | 2,412 |
| Niobrara | 19 | 48.72% | 9 | 23.08% | 4 | 10.26% | 2 | 5.13% | 4 | 10.26% | 1 | 2.56% | 39 |
| Park | 313 | 43.53% | 158 | 21.97% | 117 | 16.27% | 47 | 6.54% | 61 | 8.48% | 23 | 3.20% | 719 |
| Platte | 142 | 36.79% | 54 | 13.99% | 72 | 18.65% | 43 | 11.14% | 41 | 10.62% | 34 | 8.81% | 386 |
| Sheridan | 545 | 45.45% | 244 | 20.35% | 213 | 17.76% | 84 | 7.01% | 66 | 5.50% | 47 | 3.92% | 1,199 |
| Sublette | 104 | 59.09% | 25 | 14.20% | 27 | 15.34% | 8 | 4.55% | 11 | 6.25% | 1 | 0.57% | 176 |
| Sweetwater | 638 | 30.40% | 392 | 18.68% | 439 | 20.91% | 162 | 7.72% | 371 | 17.68% | 97 | 4.62% | 2,099 |
| Teton | 1,063 | 39.52% | 557 | 20.71% | 889 | 33.05% | 67 | 2.49% | 79 | 2.94% | 35 | 1.30% | 2,690 |
| Uinta | 198 | 37.57% | 129 | 24.48% | 71 | 13.47% | 39 | 7.40% | 69 | 13.09% | 21 | 3.98% | 527 |
| Washakie | 65 | 33.68% | 42 | 21.76% | 36 | 18.65% | 19 | 9.84% | 20 | 10.36% | 11 | 5.70% | 193 |
| Weston | 37 | 35.92% | 25 | 24.27% | 11 | 10.68% | 7 | 6.80% | 14 | 13.59% | 9 | 8.74% | 103 |
| Total | 9,585 | 40.59% | 4,928 | 20.87% | 4,213 | 17.84% | 2,140 | 9.06% | 1,882 | 7.97% | 865 | 3.66% | 23,613 |

## General election
### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Safe R | October 29, 2020 |
| Inside Elections | Safe R | October 28, 2020 |
| Sabato's Crystal Ball | Safe R | November 2, 2020 |
| Daily Kos | Safe R | October 30, 2020 |
| Politico | Safe R | November 2, 2020 |
| RCP | Safe R | October 23, 2020 |
| DDHQ | Safe R | November 3, 2020 |
| 538 | Safe R | November 2, 2020 |
| Economist | Safe R | November 2, 2020 |

### Post-primary endorsements

U.S. presidents
* Donald Trump, 45th president of the United States
Organizations
* Susan B. Anthony List
U.S. vice presidents
* Joe Biden, 47th Vice President of the United States (2009–2017), United States Senator from Delaware (1973–2009), Democratic nominee for the 2020 United States presidential election
U.S. senators
* Ed Markey, U.S. senator from Massachusetts (2013–present), Member of the U.S. House of Representatives from Massachusetts's 5th congressional district (2013), Massachusetts's 7th congressional district (1976–2013)
* Elizabeth Warren, U.S. senator from Massachusetts (2013–present)
Organizations
* Center for Biological Diversity
* Friends of the Earth
* Retake the Senate 2020
* Sierra Club
* We the People
* Women to Win
* Wyoming Democratic Party

### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Cynthia Lummis (R) | Merav Ben-David (D) | Undecided |
| University of Wyoming | October 8–28, 2020 | 614 (LV) | ± 4% | 56% | 26% | – |

### Results

Lummis outperformed fellow Republican Donald Trump in the concurrent presidential election by 2.9%, or 4,541 votes. She also won Albany County by 1%, or 182 raw votes, while Trump lost it by 2.7%, or 513 votes. She performed significantly better in the Democratic stronghold of Teton County, receiving 37.3% of the total vote, compared to Trump's 29.6%.
United States Senate election in Wyoming, 2020 :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Cynthia Lummis | 198,100 | 72.85% | +0.66% |
| | Democratic | Merav Ben-David | 72,766 | 26.76% | +9.31% |
| | Write-in | Write-in | 1,071 | 0.39% | +0.11% |
| Total votes | Total votes | Total votes | 271,937 | 100.00% | |
| | Republican hold | Republican hold | Republican hold | Republican hold | Republican hold |

#### By county

By county :
| County | Cynthia Lummis Republican | Cynthia Lummis Republican | Merav Ben-David Democratic | Merav Ben-David Democratic | Write-in | Write-in | Margin | Margin | Total votes |
| County | # | % | # | % | # | % | # | % | Total votes |
| Albany | 9,220 | 50.30 | 9,038 | 49.31 | 70 | 0.38 | 182 | 0.99 | 18,328 |
| Big Horn | 4,887 | 86.42 | 756 | 13.37 | 12 | 0.21 | 4,131 | 73.05 | 5,655 |
| Campbell | 16,960 | 89.19 | 1,938 | 10.19 | 117 | 0.62 | 15,022 | 79.00 | 19,015 |
| Carbon | 5,091 | 77.70 | 1,441 | 21.99 | 20 | 0.31 | 3,650 | 55.71 | 6,552 |
| Converse | 5,715 | 84.01 | 1,028 | 15.11 | 60 | 0.88 | 4,687 | 68.90 | 6,803 |
| Crook | 3,653 | 90.35 | 372 | 9.20 | 18 | 0.45 | 3,281 | 81.15 | 4,043 |
| Fremont | 12,314 | 69.43 | 5,385 | 30.36 | 36 | 0.20 | 6,929 | 39.07 | 17,735 |
| Goshen | 4,910 | 79.93 | 1,206 | 19.63 | 27 | 0.44 | 3,704 | 60.30 | 6,143 |
| Hot Springs | 2,001 | 79.03 | 527 | 20.81 | 4 | 0.16 | 1,474 | 58.22 | 2,532 |
| Johnson | 3,921 | 81.15 | 905 | 18.73 | 6 | 0.12 | 3,016 | 62.42 | 4,832 |
| Laramie | 29,357 | 65.64 | 15,153 | 33.88 | 212 | 0.47 | 14,204 | 31.76 | 44,722 |
| Lincoln | 8,846 | 85.63 | 1,460 | 14.13 | 24 | 0.23 | 7,386 | 71.50 | 10,330 |
| Natrona | 25,061 | 72.75 | 9,210 | 26.74 | 178 | 0.52 | 15,851 | 46.01 | 34,449 |
| Niobrara | 1,133 | 87.69 | 156 | 12.07 | 3 | 0.23 | 977 | 75.62 | 1,292 |
| Park | 13,189 | 80.54 | 3,117 | 19.03 | 70 | 0.43 | 10,072 | 61.51 | 16,376 |
| Platte | 3,962 | 81.36 | 898 | 18.44 | 10 | 0.20 | 3,064 | 62.92 | 4,870 |
| Sheridan | 12,287 | 76.17 | 3,778 | 23.42 | 67 | 0.41 | 8,509 | 52.75 | 16,132 |
| Sublette | 4,004 | 82.52 | 835 | 17.21 | 13 | 0.27 | 3,169 | 65.31 | 4,852 |
| Sweetwater | 12,351 | 75.89 | 3,877 | 23.82 | 46 | 0.28 | 8,474 | 52.07 | 16,274 |
| Teton | 5,370 | 37.20 | 9,030 | 62.56 | 34 | 0.23 | -3,660 | -25.36 | 14,434 |
| Uinta | 7,550 | 82.32 | 1,597 | 17.41 | 25 | 0.27 | 5,953 | 64.90 | 9,172 |
| Washakie | 3,277 | 83.00 | 659 | 16.69 | 12 | 0.30 | 2,618 | 66.31 | 3,948 |
| Weston | 3,041 | 88.20 | 400 | 11.60 | 7 | 0.20 | 2,641 | 76.60 | 3,448 |
| Totals | 198,100 | 72.85 | 72,766 | 26.76 | 1,071 | 0.39 | 125,334 | 46.09 | 271,937 |