1978Final results
1978 election for Wisconsin Senate District 15
Wisconsin State Senate · Wisconsin
Timothy F. Cullen (D) won with 59.0% of the vote, defeating R. Casey Olson (R) by 18.0 points.
Timothy F. CullenDemocrat · winner · incumbent
59.0%22,759
R. Casey OlsonRepublican
41.0%15,809
38,570 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