U.S. President Joe Biden told deep-pocketed donors in New York’s Hamptons that he acknowledges worries about his debate performance against Donald Trump, and he vowed to stick with his re-election bid.

"I understand the concern about the debate,” Biden said Saturday at the oceanfront Hamptons estate of hedge fund manager Barry Rosenstein and his wife, Lizanne, who hosted him at a fundraiser. "I get it. I didn’t have a great night.”

With about 150 people in attendance, Biden repeated that he wouldn’t be running "if I didn’t believe I could win” as he seeks to rebuild momentum after the debate debacle on Thursday, which has spread alarm among Democrats. New Jersey Gov. Phil Murphy, a Democrat, hosted a reception for Biden later Saturday.