1978Final results
1978 election for South Dakota Legislative District 13
South Dakota State Senate · South Dakota
Eugene R. Mahan (D) won with 67.1% of the vote, defeating L. Bleeker (R) by 34.2 points.
Eugene R. MahanDemocrat · winner · incumbent
67.1%4,771
L. BleekerRepublican
32.9%2,340
7,111 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