The Race
Illinois's 11th U.S. House District is heading to the polls on November 3, 2026, with Bill Foster, the incumbent Democrat, squaring off against Jeff Walter, the Republican nominee. This is a solidly Democratic district, which means Foster enters as the heavy favorite. Walter won the Republican primary with 13,877 votes, edging out Michael Pierce's 12,653 votes in a crowded GOP field. Foster, meanwhile, ran unopposed in the Democratic primary, capturing 69,637 votes.
Ratings
All three major forecasters, Cook Political Report, Sabato's Crystal Ball, and Inside Elections, have called this race identically: Solid Democratic. That means Democrats are heavily favored, but the seat isn't considered a total lock. A Solid Democratic rating suggests Foster should win comfortably unless something dramatic shifts the political landscape. The ratings ranged from early June through mid-June 2026, showing remarkable stability in how experts view this matchup.
Prediction Markets
Kalshi's prediction market tells a similar story, with bettors giving Democrats an 87.63% probability of winning the seat as of June 29, 2026. Republicans get 12.37%, a gap that mirrors the expert consensus almost exactly. The market had a trading volume of 1,057, suggesting modest but genuine interest from real-money players.
Experts vs. Markets
Prediction markets vs. polls heavily agree. Both say Foster's district leans heavily Democratic, both see Walter as a long shot, and both suggest the race outcome is likely predetermined. When the forecasters and the prediction markets agree this strongly, it's a rare moment of clarity in an often-chaotic election cycle.
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