2012Final resultsIncumbent defeated
2012 election for Missouri House District 20
Missouri House of Representatives · Missouri
John A. Mayfield (D) won with 50.6% of the vote, defeating Brent Thurston Lasater (R) by 1.2 points.
John A. MayfieldDemocrat · winner
50.6%7,692
Brent Thurston LasaterRepublican · incumbent
49.4%7,514
15,206 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