2010Final results
2010 election for South Dakota Legislative District 21
South Dakota State Senate · South Dakota
Cooper Garnos (R) won with 71.6% of the vote, defeating Brandon Sazue (D) by 43.2 points.
Cooper GarnosRepublican · winner · incumbent
71.6%5,562
Brandon SazueDemocrat
28.4%2,207
7,769 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 2010
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET