Illinois House Races 2026: Underwood and Sorensen Defend
IL-14 (suburban collar counties, D+2) and IL-17 (Rockford-area, R+1) are Illinois’s two genuinely contested House seats. Both Democrats must outperform their party in a state that leans blue but has real competitive terrain.
Illinois Competitive House Seats — 2026 Ratings
IL-14 and IL-17: Two Different Battlegrounds
Lauren Underwood: Collar County Expert
IL-14 covers Kane and McHenry Counties — the western collar counties of the Chicago metropolitan area. This is suburban-to-exurban terrain: Aurora, Elgin, Joliet corridor communities where commuters who work in Chicago live in split-level homes in communities with local public schools that are the dominant political concern.
Lauren Underwood, a nurse who first won the seat in 2018 by defeating a six-term Republican, has become one of the most recognized moderate Democratic incumbents in the country. She has won four straight elections in terrain that was considered very unfavorable for Democrats in 2018. Her focus on healthcare — particularly pre-existing condition protections and insulin pricing — has been consistently the defining issue of her campaigns.
For 2026, the anti-tariff argument resonates particularly well in IL-14: the collar county economy is deeply tied to supply chains, manufacturing, and professional services that are sensitive to trade policy. Underwood enters the cycle as an incumbent with a structural fundraising advantage and a well-tested GOTV operation.
Eric Sorensen: Rockford and the Rust Belt Test
IL-17 is one of the toughest terrain assignments for a House majority: a district stretching from Rockford south through the Quad Cities to Peoria, covering working-class Rust Belt communities that have drifted steadily toward Republicans over the past decade. The R+1 partisan lean understates the challenge because the district’s demographic trajectory continues toward Republican.
Eric Sorensen won the seat in 2022 as a well-known local TV meteorologist — his face recognition in Rockford media markets gave him name ID that other candidates would have spent millions to acquire. He held it in 2024 despite a favorable Republican national environment. His willingness to break with party leadership on select votes has helped him maintain a moderate brand.
Tariffs hit IL-17 particularly hard: Caterpillar’s major Peoria operations, John Deere’s Quad Cities facilities, and the agricultural equipment supply chain throughout the district are all export-dependent and trade-sensitive. A Democratic message focused on the manufacturing and agriculture economic hit from tariff policy could be the margin of difference in this narrowly contested seat.
Chicago, Collar Counties, Downstate: Three Worlds
Illinois’s political geography divides cleanly into three zones. Chicago proper and the inner suburbs are solidly Democratic — producing margins of 70-80% Democratic in districts like IL-7 (Danny Davis) and IL-1 (Jonathan Jackson). The outer Chicago metro collar counties — DuPage, Kane, McHenry, Lake — have shifted from reliably Republican to competitive or lean-Democratic over the Trump era.
Downstate Illinois — everything south of the I-80 corridor — has moved dramatically toward Republicans over the past two decades. Districts like IL-15 (Mary Miller) and IL-12 (Mike Bost) are now safe Republican seats that deliver margins above 30 points. The Rockford/Quad Cities corridor in IL-17 is the transitional zone between downstate Republican territory and the Chicago metro Democratic zone.
The Illinois legislature drew the 2022 congressional maps as an aggressive Democratic gerrymander, but federal courts partially limited its reach. The current map still favors Democrats (D+10 statewide maps to 14 of 17 seats), but IL-17 was left genuinely competitive due to geographic constraints in the Rockford-Quad Cities region.
