Special Counsel Robert Hur, tasked with investigating President Joe Biden's handling of classified documents, is scheduled to testify before Congress in March.
US media reported that Heo will testify before the Republican-led House Judiciary Committee on March 12.
The news follows a report by Mr. Hsu that questioned the president's memory and mental strength.
The 345-page report prompted a strong reaction from Mr. Biden.
The president said last week: “I know what I'm doing. I'm president and I got this country back on its feet. I don't need his recommendation.”
House Republicans said they would ask about Heo's comments about the president's memorial.
They also asked him to turn over audio recordings and transcripts of interviews he conducted with Biden during the year-long investigation.
The report, released last week by the U.S. Department of Justice, said Biden faces no criminal charges for “intentionally” retaining or disclosing classified material as a private citizen.
The bombshell aspect of the report focused on one of the reasons why Mr. Hsu did not prosecute the 81-year-old president: Mr. Biden's memory.
The special counsel said Biden will likely be viewed by jurors not as an individual who committed a crime, but as a “well-intentioned elderly person with a poor memory.”
That characterization, one of the biggest problems facing Mr. Biden's re-election campaign, did not sit well with Mr. Biden, his allies or his lawyers.
Ahead of the release of Mr. Hur's report, a letter from White House Counsel Ed Siskel to Attorney General Merrick Garland said the special counsel commented on Mr. Biden's mental competency and reflected on the Justice Department's own policy. It accused them of “open, obvious and blatant” violations. According to reports from Politico and the New York Times.
“The special counsel can reliably and appropriately point out that the President lacked recollection of specific facts and sequences of events,” Siskel wrote in the letter. The letter was written on Feb. 7 and first reported on Thursday.
“But his report also includes allegations that the president has memory loss in a general sense, which has no law enforcement purpose.”
The White House did not respond to requests for comment.
Ho's report was written after a year-long investigation (including interviews with the president) into Biden's handling of classified documents during his time as vice president.
In it, the special counsel concluded that Biden, 81, “intentionally” retained classified files after he resigned as vice president in 2017. He then stressed that it would be difficult to convict Biden because of his age, mental health and demeanor. .
At times, he cited specific moments that Biden and his allies said were deeply personal.
In one piece, he gave a poignant example of presidential memory, writing that Biden doesn't remember “even within the last few years of my son Beau's death.”
The report intensifies criticism from some Republicans who question Biden's mental competency and advanced age as he seeks a second term in the White House.
Meanwhile, Democrats have accused Herr, a Republican who was previously selected by former President Donald Trump to be Maryland's federal prosecutor, of political bias.
After the report was released, Mr. Biden held a surprise press conference and emphatically declared, “My memory is fine.''
“How on earth could he say something like that?” the president added, referring to his son's claim that he could not remember when he died.