= Expected party margin (mean Democratic candidate vs mean Republican candidate)
D+4.7
Each candidate's share is the party's share plus 2.5 points if an incumbent, plus a candidate-specific draw (SD 3.5 points, estimated from how far same-party candidates finished apart in 2022 and 2024). The district margin itself carries statewide, regional and district error (district SD 5.0 pts). The top 1 by share win. Independents are placed with the weaker major party minus a 6.0-point penalty.
Inputs
Partisan lean (exact by towns)
Race
District
Statewide
Lean
Weight
2024 President
D+7.8
D+2.8
+5.0
0.4
2024 Governor
R+5.0
R+9.5
+4.6
0.15
2022 U.S. Senate
D+17.3
D+9.3
+7.9
0.2
2022 Governor
R+13.7
R+15.8
+2.1
0.1
2020 President
D+12.4
D+7.4
+5.0
0.15
Last House result (2024): party margin R+9.0 vs a statewide legislative environment of R+2.6, incumbency removed (-0.0) → lean -6.4, blended at 30%.