Sean Casten vs. Niki Conforti polls and 2026 forecast (Illinois's 6th District)
Our forecast gives Sean Casten (D) a 99% chance of winning (rating: Safe D), as of October 16, 2026. Expected margin: Casten +17.7; in 80% of simulations the margin falls between Casten +10.4 and Casten +25.1. Incumbent: Sean Casten (D). 2024 presidential result here: D+5.6.
House forecast · How the forecast works