**Democratic House primaries in the 2026 cycle have produced an elevated number of incumbent defeats driven by progressive challenges, generational shifts, and localized factors such as redistricting and policy disagreements over issues like Israel.** Multiple long-serving members, including those in New York, Colorado, Connecticut, and Texas districts, have fallen to younger or more left-leaning challengers, contributing to a total that aligns with the 10-12 range. Trader consensus at 92.2% for 10-12 reflects the confirmed losses to date and the limited number of remaining contests that could meaningfully alter the count. A surge of additional upsets in late-cycle primaries or unexpected holds by vulnerable incumbents could realistically push the outcome into the 13-15 bin, though such developments appear unlikely given current patterns.