2020Flipped from RepublicanFinal resultsSpecial election
2020 special election for Massachusetts Senate District 39
Massachusetts State Senate · Massachusetts
Susan Lynn Moran (D) won with 56.2% of the vote, defeating James R. McMahon III (R) by 12.5 points, flipping a seat Republicans held.
Susan Lynn MoranDemocrat · winner
56.2%11,587
James R. McMahon IIIRepublican
43.7%9,010
20,632 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)