1970Final results
1970 primary for Maryland Legislative District 7
Maryland State Senate · Maryland
Joseph A. Bertorelli (D) won with 39.4% of the vote, defeating Catherine A. Duffy (D) by 21.4 points.
Joseph A. BertorelliDemocrat · winner · incumbent
39.4%10,431
Joseph J. StaszakDemocrat · winner · incumbent
30.2%7,988
Catherine A. DuffyDemocrat
18.1%4,779
Edward R. MilaniczDemocrat
6.5%1,712
George C. MertelDemocrat
5.8%1,538
26,448 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET