House Oversight Committee Chairman James Comer (R-KY) is seeking an interview with President Joe Biden‘s personal physician, Dr. Kevin O’Connor, after concerns have mounted about the president’s age and mental acuity since the Atlanta presidential debate last month.

Comer, in a letter obtained by the Washington Examiner, is requesting an interview with O’Connor and information about the physician’s alleged involvement in a defunct healthcare company tied to Biden’s brother James Biden.

“After a concerning debate performance by President Biden against former President Donald Trump on June 27, journalists have rushed to report on what Americans have seen plainly for years: the President appears unwell,” Comer wrote in the letter to O’Connor.

“Americans question President Biden’s ability to lead the country, and the Committee on Oversight and Accountability is investigating circumstances surrounding your assessment in February of this year that ‘President Biden is a healthy, active, robust 81-year-old-male, who remains fit to successfully execute the duties of the Presidency,’” Comer added.

The committee chairman also told O’Connor that he is “concerned your medical assessments have been influenced by your private business endeavors with the Biden family,” discussing the Biden family’s past involvement with now-bankrupt healthcare company Americore.

Last year, a bankruptcy trustee testified to the committee that James Biden, the president’s brother, was paid $600,000 from Americore to allow the company to use the Biden last name to acquire funding from the Middle East. As part of investigating the Biden family and their alleged business dealings, Comer has requested O’Connor “produce all documents and communications in your possession regarding Americore and James Biden.”

The committee is also seeking to have a transcribed interview with House Oversight Committee counsel scheduled by July 14.

The White House had been unclear about what checkups Biden may have had after his disastrous debate performance last month only heightened concerns over his age and acuity, but on Thursday confirmed that Biden had a check up after the debate.

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The Biden campaign announced during the debate the president had been battling a cold.

The House Oversight Committee’s request comes a day after reports circulated about White House visitor logs showed Parkinson’s disease expert Dr. Kevin Cannard of the Walter Reed Medical Center met with O’Connor and two others at the White House residence clinic on Jan. 17, and appeared in visitor logs 10 times since Nov. 15, 2022.

Ashley Oliver contributed to this report.