WASHINGTON — President Trump complained to wealthy donors at a fund-raiser in the Hamptons last week that the man he chose as chairman of the Federal Reserve, Jerome H. Powell, has disappointed him by raising interest rates, according to people who attended the event.

In the midst of a long riff on the economy, Mr. Trump said that he had expected Mr. Powell to adhere to an easy-money monetary policy, by keeping interest rates low, when he nominated Mr. Powell in November to succeed Janet L. Yellen. Instead, Mr. Powell has continued Ms. Yellen’s pace of gradual return to historically normal rates, by raising rates twice this year.

On Monday, Mr. Trump complained about the Fed chairman publicly, telling Reuters “I’m not thrilled with his raising of interest rates, no. I’m not thrilled.” Mr. Trump, in an interview, added “I should be given more help by the Fed” through more accomodative monetary policy. “The other countries are accommodated,” Mr. Trump said, saying that both China and the European Union are manipulating their currencies.

Mr. Trump previously criticized the Fed this summer, breaking with decades of presidential convention. “I don’t like all of this work that we’re putting into the economy and then I see rates going up,” Mr. Trump told CNBC in a televised interview in July. “I am not happy about it.”