Elevated Democratic enthusiasm in opposition to the Trump administration, reflected in higher primary and special election turnout even in Republican districts, is sustaining expectations for midterm participation above recent historical averages. This dynamic, combined with expanded mail and early voting access plus generational shifts in eligible voters, has narrowed trader focus on the 115-125 million range. Competitive House races, fundraising intensity, and get-out-the-vote efforts by both parties add uncertainty around final mobilization levels. Weather on Election Day, late campaign developments, and variations in state-level engagement could shift totals within or outside this band, keeping adjacent outcomes closely priced.