Democratic enthusiasm in opposition to the Trump administration, reflected in primary turnout surges, special election overperformance, and a consistent generic congressional ballot lead of roughly six points, has elevated expectations for above-average midterm participation. Recent polling shows Democratic voters significantly more motivated to turn out than Republicans, with youth registration rates rising and early voting infrastructure supporting higher totals. However, the market remains tightly clustered around the 115-125 million range because historical patterns show substantial drop-off from presidential-year levels, redistricting has reduced competitive districts, and Republicans retain advantages in fundraising and targeted mobilization of their coalition. Developments that could widen separation include sustained economic pressures widening the enthusiasm gap, late-cycle campaign spending surges, or shifts in likely-voter screens that either boost or dampen projected participation relative to the 47-52% turnout models.