National Security Council spokesman John Kirby was left speechless Wednesday when questioned by a reporter over whether President Biden is "corrupt."

The exchange between Kirby and New York Post reporter Steven Nelson took place during the daily White House press briefing as the former was taking questions on foreign policy-related issues.

"There have been many developments in the House investigations into the first family's international business dealings recently," Nelson said, referencing the Republican-led House Oversight Committee's ongoing investigation into the Biden family.

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Joe Biden and John Kirby

President Biden, left, and National Security Council spokesman John Kirby. (Getty Images)

Nelson noted the committee's efforts to obtain an FBI document that allegedly describes a criminal scheme involving Biden and a foreign national and relating to the exchange of money for policy decisions. 

He also mentioned the IRS whistleblower who has alleged there was an attempt by the DOJ to slow-walk its investigation into Hunter Biden's finances, as well as a recent poll that found a majority of voters believe the president was involved in "an illegal influence peddling scheme" alongside his son while he was vice president.

"So what do you say to the majority of Americans who believe that the president is himself corrupt?" Nelson asked Kirby.

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President Joe Biden and family

President Biden and first lady Jill Biden, joined by Hunter Biden and Ashley Biden, attend their granddaughter Maisy Biden's graduation from the University of Pennsylvania at Franklin Field in Philadelphia on May 15, 2023. (BRENDAN SMIALOWSKI/AFP via Getty Images)

"Wow," Kirby said as he shook his head. His reaction was followed with a long pause of silence.

"The president has spoken to this and there's nothing to these claims. And as for the whistleblower issue that you talked about and in the document — I believe the FBI has spoken to that, and you're going to have to go to them on that," he eventually said.

House Oversight Committee Chairman Rep. James Comer, R-Ky., is prepared to start the process of holding the FBI in contempt of Congress this week if the bureau does not comply with the subpoena for the document allegedly related to the possible criminal scheme involving Biden.

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Republican Kentucky Rep. James Comer

House Oversight and Accountability Committee Chairman James Comer, R-Ky. (AP Photo/J. Scott Applewhite)

Comer first subpoenaed the document earlier this month. The FBI did not turn it over and instead explained that it needed to protect the bureau's confidential human source program.

The document is being sought after a whistleblower approached Comer and Sen. Chuck Grassley, R-Iowa, alleging that the FBI and the DOJ were in possession of it, and that it would reveal "a precise description of how the alleged criminal scheme was employed as well as its purpose."

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The White House has slammed the committee’s investigation as "evidence-free" and "politically motivated." The White House has also maintained that Biden has never been involved in his son’s business dealings.

Fox News' Brooke Singman contributed to this report.