John Curtis, the mayor of Provo, Utah’s third-largest city, won the race to represent the state's Third Congressional District, a role left vacant when Jason Chaffetz resigned to become a Fox News commentator. Mr. Curtis emerged from a contested primary as the Republican nominee and had held a wide lead in polls. Though the Democratic candidate, Kathie Allen, raised a sizable sum of money online by tapping into liberal loathing of Mr. Chaffetz, the district is overwhelmingly conservative.

Get Election Updates Want to know when we’ll have live election results? Sign up to be notified on election days.