2006Flipped from RepublicanFinal resultsIncumbent defeated
2006 election for Wisconsin Senate District 23
Wisconsin State Senate · Wisconsin
Pat Kreitlow (D) won with 50.9% of the vote, defeating David A. Zien (R) by 1.7 points, a seat Republicans won last time.
Pat KreitlowDemocrat · winner
50.9%31,590
David A. ZienRepublican · incumbent
49.1%30,505
62,095 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 2006
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET