MA-09 · House · 2026
Democrats are heavily favored to win this seat
99% probability
Candidates
Candidates unconfirmed -- under review. This race's primary has passed but our roster does not yet have a confirmed name; a re-check has been queued.
Checked 2026-09-14 -- candidates could not be confirmed from the source at that time.
Not yet determined
Democrat
Not yet determined
Republican
Held by a Democrat, seeking re-election.
Why we think this
- This district's baseline partisan lean favors Democrats by about 7 points of margin before anything else is considered.
- The seat is currently held by a Democrat, who is running for re-election -- incumbents usually run ahead of their party's baseline.
Model details -- coefficients, calibration, and the full technical decomposition.
Model house-2026-panel-v1 · computed 2026-09-16