Rep. Lauren Boebert (R., Colo.) was facing an unexpectedly strong challenge from Democrat Adam Frisch late Tuesday, in a race that few political analysts had on their radar.\n\nWith 93% of expected total vote reporting Wednesday morning, the Associated Press has Mr. Frisch leading with 149,421 votes, or 50.5% of the vote. Ms. Boebert has 145,946 votes, or 49.4% of the vote.\n\nMs. Boebert, a Republican and gun rights activist, was elected to represent Colorado’s Third Congressional district in 2020. The district runs along the western side of the state, encompassing cities such as Grand Junction and Pueblo. Voters have favored Republican presidential candidates for at least two decades.\n\nIn her two short years on the Hill, Ms. Boebert has made headlines as a House Freedom Caucus member aligned with former President Donald Trump. She has challenged Republican leadership at times and become a frequent critic of the Biden administration’s military vaccine mandates.\n\nNo mainstream polling group ever surveyed voters in the race, a sign that it was not considered competitive. Voting results from the state’s primary races in June did not signal a tight race either: Mr. Frisch got 25,751 votes, roughly 42% of Democratic votes cast in that race.\n\nA total of 130,808 Republicans voted in the state’s primary; Ms. Boebert claimed two of every three votes cast.