1978Final results
1978 election for Massachusetts Senate District D20
Massachusetts State Senate · Massachusetts
William X. Wall (D) won with 67.1% of the vote, defeating Michael W. Seddon (R) by 34.2 points.
William X. WallDemocrat · winner · incumbent
67.1%29,926
Michael W. SeddonRepublican
32.9%14,684
44,611 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 1978
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET