1986Final results
1986 election for South Dakota Legislative District 31
South Dakota State Senate · South Dakota
James B. Dunn (R) won with 60.1% of the vote, defeating C. Richard Ruddell (D) by 20.3 points.
James B. DunnRepublican · winner · incumbent
60.1%5,024
C. Richard RuddellDemocrat
39.9%3,331
8,355 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1986
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET