1990Flipped from DemocraticFinal resultsIncumbent defeated
1990 election for South Dakota Legislative District 27
South Dakota State Senate · South Dakota
Roger Porch (R) won with 59.0% of the vote, defeating Dick Waddell (D) by 18.1 points, a seat Democrats won last time.
Roger PorchRepublican · winner
59.0%4,169
Dick WaddellDemocrat · incumbent
41.0%2,893
7,062 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 1990
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET