One of the top House Democrats on Thursday endorsed Democratic congressional hopeful Anna Throne-Holst in New York’s 1st district in Suffolk County.

Rep. Steny Hoyer, a Maryland lawmaker and Democratic minority whip, is one of the more high-profile endorsements in the race for Throne-Holst as Democrats eagerly eye taking on Republican Rep. Lee Zeldin.

Zeldin, a former state senator elected in 2014 to Congress, represents a swing district in eastern Long Island, and defeated incumbent Democrat Tim Bishop.

“Anna Throne-Holst is a tested problem-solver who has real experience fixing Republican mismanagement,” Hoyer said. “I look forward to working with her in Congress to create jobs, improve educational opportunities, and invest in our infrastructure. I am proud to endorse her for Congress.”

Throne-Holst does face a potential primary with fellow Democrat Dave Calone in June. But Long Island Democrats, along with one upstate lawmaker, are backing her bid.

Outgoing Rep. Steve Israel, along with Rep. Joe Crowley, Rep. Kathleen Rice, Rep. Carolyn Maloney, Rep. Paul Tonko and former Rep. Carolyn McCarthy have endorsed Throne-Holst.