2012Final resultsIncumbent defeated
2012 election for Washington Legislative District 10
Washington State Senate · Washington
Barbara Bailey (R) won with 52.8% of the vote, defeating Mary Margaret Haugen (D) by 5.6 points.
Barbara BaileyRepublican · winner
52.8%37,810
Mary Margaret HaugenDemocrat · incumbent
47.2%33,778
71,588 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 2012
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET