Traders assign Illinois a 77.5% chance of hosting the closer 2026 governor race because recent polling averages show a modestly narrower Democratic edge there than in Pennsylvania. Incumbent JB Pritzker leads Republican Darren Bailey by roughly 20 points in available surveys, with an independent candidate drawing low-single-digit support that could further compress the final margin. In contrast, Josh Shapiro maintains a steadier 22- to 23-point lead over Stacy Garrity across multiple Pennsylvania polls, bolstered by strong fundraising and consistent performance in a swing state. Both contests feature Democratic incumbents seeking reelection on November 3, with recent debates producing no major shifts in positioning. Pennsylvania’s structural competitiveness has so far supported expectations of a wider gap, while Illinois fundamentals point to a tighter outcome.