U.S. Representative Mike Bost officially filed for re-election Monday at the Illinois State Board of Elections headquarters in Springfield.
Bost’s campaign submitted 5,013 petition signatures from voters across all 34 counties in the 12th Congressional District—nearly four times the number required by law.
Bost, who announced his re-election bid in May, has received endorsements from President Donald J. Trump and more than 200 Republican elected officials throughout Southern Illinois.
The Primary Election is scheduled for March 17, 2026.