1990Flipped from RepublicanFinal resultsIncumbent defeated
1990 election for South Dakota Legislative District 9
South Dakota State Senate · South Dakota
Roberta A. Rasmussen (D) won with 54.3% of the vote, defeating Walt Bones Jr. (R) by 8.6 points, a seat Republicans won last time.
Roberta A. RasmussenDemocrat · winner
54.3%3,681
Walt Bones Jr.Republican · incumbent
45.7%3,101
6,782 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