1978Final resultsIncumbent defeated
1978 election for South Dakota Legislative District 27
South Dakota State Senate · South Dakota
Lyndell Petersen (R) won with 22.5% of the vote, defeating Donald L. Frankenfeld (R) by 0.8 points.
Lyndell PetersenRepublican · winner · incumbent
22.5%11,058
Donald L. FrankenfeldRepublican · incumbent
21.8%10,675
Carl HamRepublican
21.3%10,455
Michael BrubakerDemocrat
12.2%5,966
Bob McBrideDemocrat
11.9%5,819
Paul JensenDemocrat
10.4%5,094
49,067 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 1978
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET