Rep. Scott Tipton, a Republican, is running against Democrat Diane Mitsch Bush in the race to represent Colorado's 3rd Congressional District.
Tipton has represented the district in the House since 2011.
Tipton did not face a challenger in the June 26 Republican primary; Mitsch Bush won the Democratic primary with 64 percent of the vote.
Each House seat is up for election every two years.
The district went for President Trump, a Republican, in 2016 by a margin of 11.9 points. Democrat Hillary Clinton won Colorado by 4.9 points.
Colorado has seven House seats, three of which are held by Democrats and four by Republicans. The state’s senators are Michael F. Bennet, a Democrat, and Cory Gardner, a Republican.
Data is from the Associated Press. This story may be updated if more information becomes available. It is powered by Heliograf, The Post's artificial intelligence system.