House District 55
Pittsburgh metro · currently held by R (Jill N. Cooper)
Forecast
99%
chance Jill Nixon Cooper (R) wins
- Democrat
- Davon Tyrone Magwood
- Republican
- Jill Nixon Cooper
- Rating
- Safe R
- Expected margin
- R+19.0 (90% range R+31.5 to R+6.3)
- Chance of flipping
- 0.8%
- Tipping-point chance
- 0.0% (chance this seat decides control)
How the forecast was built
| Statewide generic legislative margin (environment) | D+6.6 |
| + District partisan lean | -22.0 |
| = Fundamentals before candidates | R+15.3 |
| + Incumbency advantage | -2.8 |
| + Incumbent's past over-performance (shrunk) | -1.3 |
| = Fundamentals margin | R+19.4 |
| No public district polls | |
| External ratings prior (weight 25%) | +0.5 |
| Final expected margin | R+18.9 |
District-level error SD 6.5 pts; total with statewide and regional error ≈ 7.7 pts.
Inputs
Partisan lean (current lines)
| Race | District | Statewide | Lean | Weight |
|---|---|---|---|---|
| 2024 President | R+22.8 | R+1.8 | -21.0 | 0.45 |
| 2022 Governor | R+3.2 | D+15.0 | -18.3 | 0.2 |
| 2022 U.S. Senate | R+15.7 | D+5.0 | -20.7 | 0.2 |
| 2020 President | R+23.0 | D+1.1 | -24.1 | 0.15 |
Last legislative result (2024): R+35.6 vs a statewide legislative environment of R+8.2 → lean -24.6, blended at 30%.
Candidates & money
- Incumbent
- Jill N. Cooper (R) — running
- Receipts
- no matched PA DoS filings for both sides
Past results in this district
| Year | Democrat | Republican | Margin |
|---|---|---|---|
| 2024 | Davon Magwood | Jill Nixon Cooper | R+35.6 |
| 2022 | Scott Gauss | Jill Nixon Cooper | R+23.0 |
| 2020 | Joseph A Petrarca | Jason Roy Silvis | R+4.6 |
External ratings
| Source | Rating | Implied P(Dem) | Weight | As of |
|---|---|---|---|---|
| state_navigate | Safe R (solid r) | 1% | 0.25 | 2026-10-15 |
Ratings are blended as a prior, not copied: they moved this seat's expected margin by +0.5 points.