1978Flipped from DemocraticFinal results
1978 election for Oklahoma Senate District 20
Oklahoma State Senate · Oklahoma
Don Nickles (R) won with 54.4% of the vote, defeating John A. Heinze (D) by 8.9 points, a seat Democrats won last time.
Don NicklesRepublican · winner
54.4%10,347
John A. HeinzeDemocrat
45.6%8,660
19,007 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 1978
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET