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Thomas Dempster

3 races across State Senate, State House in South Dakota, 2W-1L

Republican
State SenateState House
Electoral Grade
—
Requires 3+ graded races
3
Races
2-1
W-L (67%)
-3.3
Avg Margin
1988–2006
Career Span
Best: +11.0 (1988 State House)Worst: -13.4 (2004 State Senate)
67%
Win Rate
2
Win Streak
18 yrs
Career Span
13K
Career Votes

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

State House
State Senate
R+10EvenD+101988: D+11.0 - Click to view2004: R+13.4 - Click to view2006: R+7.5 - Click to view198820042006

Career Timeline

2006 State SenateSouth DakotaDistrict 9
4,250
Candidate Votes
53.8%
Vote %
7,905
Total Votes
-7.5%
Margin
Top opponent: Paul NielsonDEM

Geographic Performance

3 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

3 races available

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

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Opponents Faced3 opponents

Paul NielsonDEM
1-02006 State Senate(-7.5)
Barbara J HimmelrobertsDEM
1-02004 State Senate(-13.4)
Mary VanderlindeDEM
0-11988 State House(+11.0)
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