1970Final results
1970 election for Minnesota Senate District 64
Minnesota State Senate · Minnesota
Gene Mammenga (Oth) won with 63.7% of the vote, defeating Chester A. Oman (Oth) by 27.4 points.
Gene MammengaOther party · winner · incumbent
63.7%9,684
Chester A. OmanOther party
36.3%5,523
15,207 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 1970
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET