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James H. Duff

a strong candidate who ran for senate and governor and house in Pennsylvania, 2W-2L

Republican
US SenateGovernorUS House
Electoral Grade
B-
+3.6 pts
avg overperformance
Better than 41% of candidates3 graded races

Overperformance vs. state presidential baseline. Incumbents held to a higher bar: Senate/Gov −3 pts.

4
Races
2-2
W-L (50%)
-7.0
Avg Margin
1790–1956
Career Span
Best: +0.4 (1956 Senate)Worst: -17.9 (1946 Governor)
50%
Win Rate
+3.3
Avg Overperformance
2
Win Streak
166 yrs
Career Span
5.9M
Career Votes
Top 59%
Percentile

Evidence & provenance

Source owners

Certified contest returns, candidate career records, and Akashic Edge deterministic grading inputs.

Freshness

Rendered Apr 14, 2026 from the latest candidate, contest, and forecast tables loaded in Akashic Edge.

Boundary scope

Candidate-level profile spanning every contest recorded for this person in Akashic Edge.

Claim type

Deterministic summaries, calculated grades, and certified election history. No freeform AI prose.

Source chain

MethodologyCertified contest returnsCandidate grade inputs
Open methodology

Career Margin Trend3 races

Governor
Senate
Even1946: R+17.9 - Click to view1950: R+3.6 - Click to view1956: D+0.4 - Click to view194619501956

Career Timeline

2,250,671
Candidate Votes
49.7%
Vote %
4,529,874
Total Votes
+0.4%
Margin
Electoral Performance
-8.8
Race Score
-5.8
vs. State Pres.
D-5.4
State Pres.
Incumbent (−3pt bar)
Top opponent: Joseph S. ClarkDEM

Key Insights

2 insights generated

Deterministic highlights from career record, margins, and standout performances.

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Geographic Performance

4 races with county data

County-level results, strongest and weakest counties, and performance by county type.

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County Results Table

Sortable, searchable table of every county result for each race.

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Demographic Coalition Analysis

4 races available

Scatter plots correlating county performance with demographics: race, education, income, foreign-born.

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Similar Candidates

8 matches found

Candidates with the closest career profiles — same era, similar performance.

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Historian Query

Ask the Historian

Curious about James H. Duff's performance?

Ask the Historian

Interactive AI-powered chat about James H. Duff's career, opponents, and performance.

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