1980Final results
1980 Democratic primary for Missouri House District 138
Missouri House of Representatives · Missouri
Mary Manard (D) won with 52.5% of the vote, defeating Don C. Swanson (D) by 5.0 points.
Mary ManardDemocrat · winner
52.5%670
Don C. SwansonDemocrat
47.5%606
1,276 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET