2012Final results
2012 election for Kansas Senate District 28
Kansas State Senate · Kansas
Mike Petersen (R) won with 52.7% of the vote, defeating Keith Humphrey (D) by 5.4 points.
Mike PetersenRepublican · winner · incumbent
52.7%9,853
Keith HumphreyDemocrat
47.3%8,852
18,705 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