Republican state Rep. Mike Bost has defeated first-term Democratic U.S. Rep. Bill Enyart in southern Illinois' 12th District.
The district has been in Democratic hands for more than two decades but has grown increasingly conservative on social issues. It stretches from the eastern St. Louis suburbs to the Kentucky border. Bost is from Murphysboro and has served in the Illinois House for 19 years. Enyart is a Belleville Democrat and former Illinois National Guard adjutant general.