House District Strafford 18 (floterial)
Seacoast and Strafford · 1 seat · Barrington, Middleton, New Durham, Strafford · floterial: these towns also elect representatives in their base districts
Forecast
0.2 expected Democratic seat of 1
- Held today
- 0 D, 1 R
- On the ballot
- 1 Democrat, 1 Republican for 1 seat
- District party margin
- R+6.0 (90% range R+16.9 to D+4.9)
- Chance Democrats gain seats here
- 15%
- Chance Democrats lose seats here
- 0%
- Rating (seat share)
- Likely R
Seat split distribution
Candidates
| Candidate | Party | Win chance |
|---|---|---|
| Michael Harrington (incumbent) | R | 85% |
| Thom Flynn | D | 15% |
How the forecast was built
| Statewide generic legislative margin (environment) | D+2.9 |
| + District partisan lean | -8.9 |
| = Expected party margin (mean Democratic candidate vs mean Republican candidate) | R+6.0 |
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 | R+5.6 | D+2.8 | -8.4 | 0.4 |
| 2024 Governor | R+17.0 | R+9.5 | -7.5 | 0.15 |
| 2022 U.S. Senate | R+0.9 | D+9.3 | -10.3 | 0.2 |
| 2022 Governor | R+23.9 | R+15.8 | -8.1 | 0.1 |
| 2020 President | R+2.8 | D+7.4 | -10.1 | 0.15 |
Last House result (2024): party margin R+14.0 vs a statewide legislative environment of R+2.6, incumbency removed (+2.5) → lean -8.9, blended at 30%.
Past results in this district
2024 — D 0, R 1 of 1 · party margin R+14.0
| R Michael Harrington (i) | 6,670 | ✓ |
| D Kimberly McGlinchey | 5,031 |
2022 — D 0, R 1 of 1 · party margin R+6.9
| R Harrington (i) | 4,925 | ✓ |
| D Cilley | 4,289 |