2018 United States Senate election in Wyoming

The 2018 United States Senate election in Wyoming took place on November 6, 2018, to elect a member of the United States Senate to represent the State of Wyoming. The primary election took place August 21, 2018. Republican John Barrasso won re-election with 67% percent of the vote, the lowest percentage of his three U.S. Senate campaigns and the closest a Democrat has come to winning a seat since the 1996 election, and the first time since that election in which Democrats managed to even win counties in the state, those being Teton and Albany, and the first time that the Democratic candidate won any counties for this seat since 1994.

Background
In 2012, incumbent Republican John Barrasso was re-elected with 76% of the vote. Heavily rural, Wyoming has the smallest population of any state and is considered the most Republican state in the nation. It has not elected a Democratic Senate candidate since 1970. In 2008, Republican presidential nominee John McCain carried the state with 64% of the vote. Republican Mitt Romney won it in 2012 with 68% of the vote, and Republican Donald Trump won it in 2016 with 67% of the vote.

Nominated

 * John Barrasso, incumbent U.S. Senator

Declared

 * Dave Dodson, businessman
 * Rocky De La Fuente, perennial candidate, and candidate for President of the United States in 2016
 * John Holtz, attorney
 * Anthony Van Risseghem

Declined

 * Foster Friess, businessman (running for Governor of Wyoming)
 * Erik Prince, founder of Academi

Withdrawn

 * Charlie Hardy, Democratic nominee for U.S. Senate in 2014 and candidate for U.S. House of Representatives in 2016 (endorsed Dave Dodson)

Results
[[File:2018 WY US Senate Republican primary.svg|thumb|Results by county: {{legend|#E27F7F|Barrasso}}

{{legend|#E27F7F|50–60%}}

{{legend|#D75D5D|60–70%}}

{{legend|#D72F30|70–80%}} {{legend|#FF9A50|Dodson}}

{{legend|#FF9A50|50–60%}} ]]

Nominated

 * Gary Trauner, businessman and nominee for the U.S. House of Representatives in 2006 and 2008

Declined

 * Mary Throne, former Minority Leader of the Wyoming House of Representatives (running for Governor)

Results
[[File:2018 WY US Senate Democratic primary.svg|thumb|Results by county: {{legend|#7996E2|Trauner}}

{{legend|#0D0596|90–100%}} ]]

Withdrew

 * Dave Dodson, businessman (running as a Republican)

County results

 * Counties that flipped from Republican to Democratic
 * Albany (largest municipality: Laramie)
 * Teton (largest municipality: Jackson)