Mr. Ozkural is one of several high-profile bidders in a feverish competition to win time with one of Mr. Trump’s children. Other bidders include the owner of a Tex-Mex restaurant chain from Houston who wants to press Mr. Trump, through his daughter, about immigration policy, and a real estate executive and fringe presidential candidate from Florida who wants to send a message to Mr. Trump about election fraud…

Now they may not get a chance to “Enjoy Coffee with Ivanka Trump in NYC or DC,” by winning the auction on LOT #:1182106, hosted by a New York company called Charitybuzz. The money was to go to a foundation led by Ms. Trump’s brother Eric to benefit St. Jude Children’s Research Hospital of Tennessee.

But Eric Trump told The New York Times on Thursday that he was considering shutting down the bidding — 10 days after it started — about an hour after The Times raised questions about the auction…

“You never, ever want to have government officials using their public office for the private gain, even for a worthy charity,” Mr. Eisen said. “That was how we did it.”