House District 102
Central PA · currently held by R (Russ Diamond)
Forecast
100%
chance Russell H Diamond (R) wins
- Democrat
- Matthew D Duvall
- Republican
- Russell H Diamond
- Rating
- Safe R
- Expected margin
- R+33.8 (90% range R+46.5 to R+21.0)
- Chance of flipping
- 0.0%
- 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 | -40.9 |
| = Fundamentals before candidates | R+34.3 |
| + Incumbency advantage | -2.8 |
| = Fundamentals margin | R+37.1 |
| No public district polls | |
| External ratings prior (weight 25%) | +3.3 |
| Final expected margin | R+33.8 |
District-level error SD 6.6 pts; total with statewide and regional error ≈ 7.8 pts.
Inputs
Partisan lean (current lines)
| Race | District | Statewide | Lean | Weight |
|---|---|---|---|---|
| 2024 President | R+41.9 | R+1.8 | -40.2 | 0.45 |
| 2022 Governor | R+24.0 | D+15.0 | -39.0 | 0.2 |
| 2022 U.S. Senate | R+37.4 | D+5.0 | -42.4 | 0.2 |
| 2020 President | R+42.7 | D+1.1 | -43.9 | 0.15 |
Candidates & money
- Incumbent
- Russ Diamond (R) — running
- Receipts
- no matched PA DoS filings for both sides
Past results in this district
| Year | Democrat | Republican | Margin |
|---|---|---|---|
| 2024 | nan | Russell H Diamond | uncontested |
| 2022 | Susan Laura Quick | Russell H Diamond | R+40.2 |
| 2020 | Matthew Duvall | Russ Diamond | R+40.4 |
External ratings
| Source | Rating | Implied P(Dem) | Weight | As of |
|---|---|---|---|---|
| state_navigate | Safe R (solid r) | 0% | 0.25 | 2026-10-15 |
Ratings are blended as a prior, not copied: they moved this seat's expected margin by +3.3 points.