1980Flipped from DemocraticFinal resultsIncumbent defeated
1980 election for Washington Legislative District 4
Washington State Senate · Washington
Bob McCaslin (R) won with 56.7% of the vote, defeating William S. Day (D) by 13.3 points, a seat Democrats won last time.
Bob McCaslinRepublican · winner
56.7%21,802
William S. DayDemocrat · incumbent
43.3%16,667
38,469 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 1980
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET