1980Flipped from RepublicanFinal results
1980 election for South Dakota Legislative District 12
South Dakota State Senate · South Dakota
Roger McKellips (D) won with 60.6% of the vote, defeating Larry Tidemann (R) by 21.3 points, a seat Republicans won last time.
Roger McKellipsDemocrat · winner
60.6%6,522
Larry TidemannRepublican
39.4%4,232
10,754 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 1980
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET