HEMPSTEAD, N.Y. — In a forceful rebuke to President Trump and other Washington Republicans, former Vice President Joe Biden told fellow Democrats in New York on Thursday that the GOP has abandoned traditional American values in the name of ‘‘phony populism’’ and ‘‘fake nationalism.’’

Speaking at the party’s New York state convention on Long Island, Biden urged his party to stand for tolerance and efforts to expand education and economic opportunity.

‘‘This is not your father’s Republican Party,’’ Biden told the audience. ‘‘They are not who we are. They are not who America is. What they are doing is sending a vision of America around the world that is distorted. That is damaging. That is hurting us... this phony populism, this fake nationalism.... It’s time to say ‘no more.’ ’’

Biden’s remarks came during a speech endorsing Governor Andrew Cuomo’s bid for a third term. Cuomo easily won his party’s nomination Wednesday but still faces a likely primary challenge from ‘‘Sex and the City’’ star and liberal activist Cynthia Nixon. Dutchess County Executive Marc Molinaro won the GOP nomination for governor at that party’s convention Wednesday in Manhattan.

Cuomo, who like Biden is considered a potential White House contender, followed Biden with his own scorching criticism of Trump and the Republicans, but he also leveled some criticism at his own party’s handling of the 2016 election. He said voters want leaders who deliver ‘‘practical progress for people in need’’ and not ‘‘pontification from an ivory tower.’’

‘‘We have to take a long look in the mirror and face some hard truths,’’ said Cuomo, the son of the late former governor Mario Cuomo. ‘‘We lost the connection with who we are. ... It’s a national problem and the Democratic Party all across the country is still searching for its way forward.’’