The Retail, Wholesale and Department Store Union on Monday endorsed Democratic Senate hopeful Adrienne Esposito in the third Senate District.

The Suffolk County district, currently represented by Republican congressional candidate Lee Zeldin, is considered one of several battleground Senate races around the state.

Esposito’s Republican opponent is Tom Croci, the Islip town supervisor.

“I am honored to be endorsed by the hardworking men and women of RWDSU. I come from middle class roots, and the RWDSU has a long and proud history of fighting and winning battles for working families like mine. I look forward to working with RWDSU as a Senator to make life better for the hardworking residents of Suffolk County,” Esposito said in a statement.

RWDSU is a labor group that is known for its early endorsements in closely watched races. RWDSU President Stuart Applbaum praised Esposito’s work as an environmental advocate on Long Island.

“Adrienne has an extensive understanding of issues that are important to working people, said Stuart Applbaum, President of the Retail, Wholesale and Department Store Union. “Her work in Albany as well as her grassroots efforts to uplift the Long Island community will make her a strong addition to the Senate Democratic Party and her dedication to fight for the public interest of New Yorkers make her a true supporter of the progressive movement.”