1978Final results
1978 election for Wisconsin Senate District 25
Wisconsin State Senate · Wisconsin
Daniel O. Theno (R) won with 65.1% of the vote, defeating Eileen Mershart (D) by 30.1 points.
Daniel O. ThenoRepublican · winner · incumbent
65.1%31,647
Eileen MershartDemocrat
34.9%16,989
48,639 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