1988Flipped from RepublicanFinal resultsIncumbent defeated
1988 election for South Dakota Legislative District 33
South Dakota State Senate · South Dakota
Judith R. Olson (D) won with 56.0% of the vote, defeating Ed Glassgow (R) by 12.0 points, a seat Republicans won last time.
Judith R. OlsonDemocrat · winner
56.0%4,842
Ed GlassgowRepublican · incumbent
44.0%3,802
8,644 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 1988
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET