Rep. William Lacy Clay, a Democrat, has won another term representing Missouri's 1st Congressional District, beating Robert Vroman, a Republican.
With all precincts reporting, Clay has 80.1 percent of the vote, followed by Vroman with 16.7 percent.
Clay has represented the district in the House since 2001.
Democrats have gained a majority in the House, with 235 seats in the next Congress. All of Missouri's House seats have been decided; Republicans have held six seats, while Democrats have held two.
The number of votes cast for Democrats in House races has increased 55.0 percent from the 2014 midterms, compared with an increase of 25.6 percent for Republicans.
The district went for Democrat Hillary Clinton in 2016 by a margin of 58 points. President Trump, a Republican, won Missouri by 18.5 points.
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.