The UFT’s four endorsed candidates claimed victory with the help of UFT members who cast ballots in the Nov. 3 special elections where every vote mattered since turnout was low.

“I want to thank all of the UFT volunteers and all of our members who got to the polls and exercised their right to vote,” said Paul Egan, the union’s political director. “We couldn’t have won these elections without you.”

Michael McMahon, a Democratic ex-congressman and city councilman, handily defeated Republican opponent Joan Illuzzi, a former Manhattan prosecutor, in the hotly contested race for Staten Island district attorney. McMahon won with 55 percent of the vote to Illuzzi’s 45 percent.

The district attorney position was vacated by Dan Donovan, a Republican, who was elected to replace Rep. Michael Grimm in Congress after the latter pleaded guilty to felony tax fraud and resigned his post in January.

In Brooklyn, Democrat Pamela Harris, a community activist who runs an after-school media arts program, defeated Republican district leader Lucretia Regina-Potter in the fight to fill the Assembly seat left vacant by Democrat Alec Brook-Krasny, who resigned to work in the private sector. Harris won with 62 percent of votes cast to Regina-Potter’s 38 percent.

Both of the union’s endorsed candidates in Queens also won their contests.

Democrat Alicia Hyndman, a local community board member who works for the State Education Department, beat out Republican state committeewoman Scherie Murray with a whopping 93 percent of the vote in the race to complete William Scarborough’s term. Scarborough resigned from the Assembly in May after pleading guilty to corruption charges.

Barry Grodenchik, a former state assemblyman, will take the Queens City Council seat vacated by Mark Weprin, who resigned in June to join the Cuomo administration. Grodenchik, a Democrat, defeated Republican Joseph Concannon, a retired police captain, by garnering 55 percent of the vote.