1990Flipped from RepublicanFinal resultsIncumbent defeated
1990 election for Idaho Legislative District 18
Idaho State Senate · Idaho
Cynthia Scanlin (D) won with 50.4% of the vote, defeating Roger B. Madsen (R) by 0.8 points, a seat Republicans won last time.
Cynthia ScanlinDemocrat · winner
50.4%4,432
Roger B. MadsenRepublican · incumbent
49.6%4,364
8,796 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 1990
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET