2008Final results
2008 election for South Dakota Legislative District 21
South Dakota State Senate · South Dakota
Cooper Garnos (R) won with 72.9% of the vote, defeating Charon Asetoyer (D) by 45.9 points.
Cooper GarnosRepublican · winner · incumbent
72.9%6,428
Charon AsetoyerDemocrat
27.1%2,385
8,813 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 2008
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET