HOUSE
Illinois IL-11 House2026
RACE AT A GLANCE
RACE TYPE
Incumbent running
Bill Foster (D)
COOK PARTISAN VOTING INDEX
Last updated : Nov 17, 2025D +50
R +50
D +6
Race summary
Rep. Bill Foster, a former Fermilab physicist, drew ire from progressives in 2024 over his support for Israel. But he shrugged aside a primary challenge from attorney and author Qasim Rashid by some 50 points, and activist groups are likely to prioritize the state’s bevy of open seats over another longshot bid against the entrenched incumbent.Key Dates
Filing Deadline: Nov 3, 2025
Primary Election: Mar 17, 2026
INCUMBENT
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INCUMBENT
Full Bio:
FOSTER, Bill, a Representative from Illinois; born in Madison, Wis., October 7,
1955; B.A. University of Wisconsin, Madison, Dane County, Wis., 1975; Ph.D.,
Harvard University, Cambridge, Mass., 1984; physicist; entrepreneur; board
member, Batavia Foundation for Educational Excellence; elected as a Democrat to
the One Hundred Tenth Congress, by special election, to fill the vacancy caused
by the resignation of United States Representative John Dennis Hastert, and
reelected to the succeeding Congress (March 8, 2008-January 3, 2011);
unsuccessful candidate for reelection to the One Hundred Twelfth Congress in
2010; elected as a Democrat to the One Hundred Thirteenth and to the two
succeeding Congresses (January 3, 2013-present).
Source: Bioguide
CANDIDATES
Republicans
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DISTRICT DATA
Illinois - 11
Chicago exurbs: Aurora, Naperville, Bolingbrook
Population Breakdown
Source: 2020 Census (VAP) for 2026
Past Presidential Results from this District
2024 Election Results
Source: Dave Leip
2020 Election Results
Source: Dave's Redistricting/VEST
RACE ANALYSIS
Race Analysis
Updated: Apr 23, 2025
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