1970Final results
1970 election for Massachusetts State Senate: MIDDLESEX 7
Massachusetts State Senate · Massachusetts
Ronald C. Mackenzie (R) won with 67.3% of the vote, defeating Philip N. Bredsen (D) by 34.6 points.
Ronald C. MackenzieRepublican · winner · incumbent
67.3%32,952
Philip N. BredsenDemocrat
32.7%16,000
48,952 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