The Retail, Wholesale and Department Store Union on Thursday unveiled its endorsement of Democratic candidate Harvey Epstein, who is vying for the seat vacated in the Assembly by Sen. Brian Kavanagh.

The district is one of nearly a dozen seats in the Legislature that will be filled in a special election on April 24, with nine alone being decided for the Assembly.

“Harvey Epstein has spent his career fighting for tenants who are struggling to make ends meet. Harvey was instrumental in negotiating the last two rent freezes through his work on the Rent Guidelines Board; he has been strong advocate for working people, just trying to keep a roof over their head, and we know he will be a strong advocate for increasing wages and benefits that will truly give working people a chance to live affordably in New York City,” said RWDSU President Stuart Appelbaum. “We are proud to endorse his candidacy today.”

Kavanagh was elected last year to the Senate to fill the district vacated by Sen. Daniel Squadron, a Democrat who left the Legislature to join a national policy institute.