1986Flipped from RepublicanFinal resultsIncumbent defeated
1986 election for South Dakota Legislative District 4
South Dakota State Senate · South Dakota
Dorothy M. Kellogg (D) won with 53.0% of the vote, defeating Thomas E. Roby (R) by 6.1 points, a seat Republicans won last time.
Dorothy M. KelloggDemocrat · winner
53.0%4,787
Thomas E. RobyRepublican · incumbent
47.0%4,237
9,024 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