1998Final results
1998 election for Illinois Representative District 55
Illinois House of Representatives · Illinois
Rosemary Mulligan (R) won with 59.0% of the vote, defeating Thomas P. Cahill (D) by 18.0 points.
Rosemary MulliganRepublican · winner · incumbent
59.0%14,380
Thomas P. CahillDemocrat
41.0%9,987
24,367 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 1998
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET