Incumbent Democrat Nikki Budzinski faces Republican Jeff Wilson in the November 3 general election for Illinois’s 13th congressional district, which covers central Illinois including Springfield, Champaign, and parts of the St. Louis suburbs. Forecasters rate the seat Solid or Safe Democratic, consistent with the district’s even-to-slightly Democratic partisan lean and Budzinski’s prior victories. Both candidates secured their nominations comfortably in the March primaries, leaving limited time or resources for the Republican challenger to close the gap. With no major late-cycle polling shifts, scandals, or national wave signals emerging in recent weeks, traders see the most likely outcome as a Democratic margin in the mid-20s to low-30s percent range, while assigning negligible probability to a Republican victory.