EAST HAMPTON, N.Y. — President Joe Biden looked to recapture his mojo and reassure donors at a Saturday fundraiser that he is fully up to the challenge of beating Donald Trump.

The 81-year-old’s troubling performance at the first presidential debate Thursday night rattled many Democrats, who see Trump after the Jan. 6, 2021, insurrection as an existential threat to democracy.

Biden and his wife, Jill, attended a campaign event in East Hampton, New York, the Long Island beach town where the real estate firm Zillow prices the median home at $1.9 million. Based on public records, the event that was closed to the news media was at the home of Avram Glazer, an owner of the Tampa Bay Buccaneers football team.

The couple then went to a second event in East Hampton at the home of investor Barry Rosenstein, whose wife, Lizanne, said the president was “a role model for what it is to get knocked down over and over and over again and get up.”

“We can waste time comparing debate nights,” she continued. “But you know what? It’s more meaningful to compare presidencies.”

Addressing the gathering, Biden quickly tore into Trump over his presidential record including his treatment of veterans and said of Thursday night’s debate, “I didn’t have a great night, but neither did Trump.”

Biden contended that the polling he’s seen shows that Democrats moved up after the debate, saying of Trump: “The big takeaway was his lies.”

He also attended a fundraiser Saturday night in Red Bank, New Jersey.

The Biden campaign said it had raised more than $27 million Thursday and Friday.