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2026 candidates we're tracking in IL-12
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Mike Bost
Republican
Incumbent
Bost is a retired U.S. Marine Corps corporal, former firefighter and small-business owner who served in the Illinois House before being elected to represent Illinois' 12th District in 2014, per the campaign site. He chairs the House Veterans' Affairs Committee, per the campaign site.
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Julie Fortier
Democratic
Fortier is a cancer research scientist and Air Force veteran who has lived in Southern Illinois for more than 25 years, per the campaign site. She says she will bring a scientist's approach to government, emphasizing evidence and measurable results, per the campaign site.
About this race
Illinois's 12th Congressional District elects one member of the U.S. House of Representatives to a two-year term. Every House seat in the country is on the ballot in 2026. The Illinois primary is Tuesday, March 17, 2026, and the general election is Tuesday, November 3, 2026.