2004Flipped from RepublicanFinal results
2004 election for South Dakota Legislative District 4
South Dakota State Senate · South Dakota
Jim Peterson (D) won with 60.7% of the vote, defeating Ed Nelson (R) by 21.4 points, a seat Republicans won last time.
Jim PetersonDemocrat · winner
60.7%6,363
Ed NelsonRepublican
39.3%4,118
10,481 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 2004
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET