Candidates could qualify for the primary ballot by either being nominated by delegates at their party's convention or gathering 7,000 signatures from registered voters.

Republican John Curtis was declared the winner and was subsequently seated by the U.S. House for a term that ends January 3, 2019.

[3] On June 17, 2017, the Democratic Party formally nominated Kathie Allen as their candidate, eliminating the need for a primary election.

Jim Bennett, the party's executive director, filed to run as its nominee but was rejected because the state had not yet processed the submitted signatures.

[19] The party took the issue to court, and a federal judge found that Utah had illegally violated Bennett's First and Fourteenth Amendment rights by denying him a spot on the ballot.

The state elections office immediately complied with the court order and declined to appeal the decision.