The tight spread between the leading 4M-4.25M and 4.25M-4.5M ranges captures uncertainty over midterm participation in an open-seat contest widely viewed as a safe Democratic hold. With Juliana Stratton favored over Don Tracy in a state that last saw a Republican Senate win in 2010, limited national attention and modest campaign intensity have tempered expectations for broad mobilization. Early voting begins September 24, aligning with historical patterns from recent non-presidential cycles where total ballots fell below presidential-year peaks, while Democratic strength in Cook County and variable downstate engagement create the narrow band traders currently price. No major late developments have yet shifted baseline assumptions around registration trends or get-out-the-vote efforts.