1970Final results
1970 election for Idaho Legislative District 12
Idaho State Senate · Idaho
Leon H. Swenson (R) won with 55.3% of the vote, defeating Una Dell Coles (D) by 10.6 points.
Leon H. SwensonRepublican · winner · incumbent
55.3%3,914
Una Dell ColesDemocrat
44.7%3,163
7,077 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 1970
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET