2010Flipped from DemocraticFinal resultsIncumbent defeated
2010 election for New York Assembly District 135
New York State Assembly · New York
Mark C. Johns (R) won with 51.3% of the vote, defeating David R. Koon (D) by 2.7 points, a seat Democrats won last time.
Mark C. JohnsRepublican · winner
51.3%26,884
David R. KoonDemocrat · incumbent
48.6%25,485
52,391 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