2008Flipped from RepublicanFinal resultsIncumbent defeated
2008 election for Iowa Senate District 8
Iowa State Senate · Iowa
Mary Jo Wilhelm (D) won with 51.8% of the vote, defeating Mark Zieman (R) by 3.6 points, a seat Republicans won last time.
Mary Jo WilhelmDemocrat · winner
51.8%14,862
Mark ZiemanRepublican · incumbent
48.2%13,836
28,698 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 2008
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET