2010Flipped from DemocraticFinal resultsIncumbent defeated
2010 election for Connecticut Senate District 31
Connecticut State Senate · Connecticut
Jason C. Welch (R) won with 51.3% of the vote, defeating Tom Colapietro (D) by 2.7 points, a seat Democrats won last time.
Jason C. WelchRepublican · winner
51.3%14,717
Tom ColapietroDemocrat · incumbent
48.7%13,944
28,661 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 2010
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET