WASHINGTON -- The White House knew it had a political problem on its hands when a special counsel report questioned U.S. President Joe Biden鈥檚 memory last month, but Biden saw a much more personal affront as well.

Robert Hur, who had been appointed to investigate whether Biden mishandled classified documents, wrote that the president couldn鈥檛 recall in an interview with prosecutors the date when his adult son, Beau, died of cancer. It was a shocking contention about a keystone event in Biden's life, and it fed into questions about whether the 81-year-old president is fit to serve another term.

鈥淗ow in the hell dare he raise that?鈥 Biden angrily declared during a hastily arranged press conference after the report was released. 鈥淔rankly, when I was asked the question, I thought to myself it wasn鈥檛 any of their damn business.鈥

The reality of the situation, however, isn鈥檛 as clear as either Biden or Hur portrayed, according to a transcript of the interview released on Tuesday before the former special counsel testifies on Capitol Hill.

Hur didn't ask the president about his son's death; Biden brought it up himself during a discussion about how he stored documents at a rental home in Virginia after leaving the vice president's office in 2017.

And Biden recalled the specific date that Beau died, although he briefly wondered aloud about the year as the conversation toggled between various events.

鈥淲hat month did Beau die?鈥 Biden mused. 鈥淥h, God, May 30th.鈥

A White House lawyer interjected by saying, 鈥2015.鈥

鈥淲as it 2015 he had died?鈥 Biden asked. When someone responded affirmatively, the president added, 鈥淚t was 2015.鈥

Biden aides defended the president鈥檚 inaccurate characterization of the interview during his press conference last month, describing his response as visceral and emotional. And they said his exchange with Hur showed how Biden believed it was important to reflect on how his son's death had affected his decision-making over subsequent years.

The transcript released on Tuesday sheds new light on one of the most politically and personally sensitive episodes in Biden鈥檚 term. Although the special counsel's investigation found no basis to bring criminal charges against Biden 鈥 unlike Donald Trump, who was indicted for refusing to return classified records to the federal government 鈥 the references to his memory threatened the president鈥檚 ability to assure voters that he can keep doing his job until he turns 86.

Beau was Delaware鈥檚 attorney general and widely viewed as his father鈥檚 political heir when he was diagnosed with a brain tumour. The cancer, which Biden connects to his son鈥檚 National Guard service near toxic burn pits on military bases in Iraq, was devastating for a family that had already suffered tragedy decades earlier. Shortly after Biden was elected to the Senate in 1972, his first wife and baby daughter were killed in a car crash that also badly injured Beau and his younger brother Hunter.

Beau died while Biden was serving as vice president, and his deep sorrow helped deter him from running for president in 2016, when Trump ultimately defeated Hillary Clinton.

Biden mentioned the death during an interview that Hur conducted on Oct. 8. They were discussing where Biden kept documents that he was 鈥渁ctively working on鈥 at his Virginia home.

The president responded by skipping back a few years to talk about how 鈥渋n this timeframe, my son is 鈥 either been deployed or is dying.鈥

After the brief exchange about the specific date, Biden began to talk about writing his book, 鈥淧romise Me, Dad,鈥 which was released in 2017.

鈥淭his is personal,鈥 he said as he talked about how 鈥淏eau was like my right arm and Hunt was my left.鈥

Hur offered Biden a break at this point, but the president insisted on continuing with a lengthy story about his family. Biden said how Beau, after he was diagnosed with cancer, made him promise not to step away from public life.

Biden decided 鈥淚 couldn't handle鈥 another run for president but he would 鈥渟tay involved.鈥 However, in a story that Biden has frequently told at fundraisers, he changed course after the white supremacist rally in Charlottesville, Virginia, in 2017 and Trump's response that there were 鈥渧ery fine people on both sides.鈥

Biden said that he is 鈥渢he antithesis鈥 of everything that 鈥渢his guy stood for鈥 and 鈥淚 could beat him.鈥

As he wrapped up the story, Biden wondered aloud whether Hur needed such a lengthy answer.

鈥淪orry for the detail,鈥 Biden said.

鈥淣o apology necessary," Hur replied.

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White House correspondent Zeke Miller contributed to this report.