Democratic Rep. Paul Tonko of the Capital Region on Tuesday gave his nod to Anna Throne-Holst, who is running in the 1st congressional district on eastern Long Island.

Trone-Holst is seeking the seat held by freshman Republican Rep. Lee Zeldin, a former state senator who defeated Democratic incumbent Tim Bishop last year.

“Anna Throne-Holst is a fighter for the middle class and those struggling to enter it,” Tonko said in a statement. “As a public servant, she has a proven track record of obtaining results for the people she serves. The halls of Congress could use more people like Anna. Whether in Upstate New York or Eastern Long Island, we both know that federal investments are required to protect our seniors, clean up our environment and create jobs. I look forward to working with Anna in the United States House of Representatives and give her my full endorsement.”

The Suffolk County House seat has been considered a swing district for several election cycles and has been eyed by Democrats as a potential flip next year, given the presidential election at the top of the ticket. Democrat Dave Calone is also seeking the Democratic nomination.

“I am grateful for Congressman Tonko’s support in our campaign. Congressman Tonko has been a great leader in fighting for the middle class,” Throne-Holst said in a statement. “I am excited to work with him to get things done for the people of New York. Everyday it is clear our campaign is continuing to gain momentum, and our message of putting the people of Suffolk County ahead of politics is resonating.”

Throne-Holst was previously endorsed by Democrats Rep. Steve Israel, Rep. Joe Crowley, Rep. Kathleen Rice, Rep. Carolyn Maloney, and former Rep. Carolyn McCarthy.