Massachusetts State Senate seat · former district
Massachusetts Senate District 39
6 elections since 2012: Democrats won 3, Republicans 3.
2020 election
Nov 3, 2020- Susan Lynn Moran (D) · won56.3%
- James R. McMahon III (R)43.7%
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
Every election for this seat
6 races since 2012; the seat changed party 2 times.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| 2020 | Susan Lynn Moran (D) | James R. McMahon III (R) | 12.6 |
| 2020 special election | Susan Lynn Moran (D)Flip | James R. McMahon III (R) | 12.5 |
| 2018 | Vinny M. Demacedo (R) | Deborah A. Rudolf (D) | 17.6 |
| 2016 | Vinny M. Demacedo (R) | — | Unopposed |
| 2014 | Vinny M. Demacedo (R)Flip | Matthew C. Patrick (D) | 25.9 |
| 2012 | Therese Murray (D) | Thomas F. Keyes (R) | 16.3 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)