The clean Democratic sweep in the 2025 elections came as no surprise to FDL Review: On November 3, we correctly predicted that Democrats would win the races for New Jersey governor and for Virginia governor, lieutenant governor, and attorney general. But we underestimated Democrats’ performance by an average of 6.25 percentage points. This article assesses where we went right and wrong in our 2025 predictions, concluding with recommendations for how Republicans can fare better in 2026. New Jersey: Our model predicted that Democratic nominee Mikie Sherrill would defeat Republican nominee Jack Ciattarelli by 2.55 percentage points. Current results show that we were directionally correct but that we underestimated the magnitude of Sherrill’s win by 10.96 points—the single worst error in FDL modeling history. Two factors contributed to our Garden State blunder. First, the governor-elect massively outperformed pre-election polls. Bad polling is nothing new for New Jersey, which a recent W...