Massachusetts House 2020 — Model Retrospective

The model's final pre-election forecast gave Rayla Campbell a 78% chance of winning the Massachusetts House 2020 primary. All Others won — an upset relative to the model's favorite.

1. Rayla Campbell — 78% model odds
2. All Others — 11% model odds (won)
3. Rachel Nicole Miselman — 11% model odds

Model accuracy · 2026 race forecasts