A top advisor to former President Joe Biden reportedly labeled Hunter Biden’s presence on a call about the Supreme Court’s landmark ruling that former presidents have some immunity from prosecution "inappropriate," according to a new book. 

The book, "2024: How Trump Retook the White House and the Democrats Lost America," was published Tuesday and chronicles how Biden’s team dismissed concerns about his age during the 2024 election cycle, along with how President Donald Trump secured his victory. 

The book said Biden’s White House chief of staff, Jeff Zients, coordinated a video call with key Biden staffers, including White House Counsel Ed Siskel, communications director Ben LaBolt, senior advisor Mike Donilon and others to discuss whether Biden should provide an on-camera statement to the Supreme Court’s July 2024 decision. 

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While Donilon already had drafted a written statement, Biden wanted to speak about the matter on-camera, the book claims. Staffers on the call started to hash out specifics of such an appearance, when Biden’s son started to chime into the call. 

"Suddenly an unidentified voice piped up from Biden’s screen and recommended an Oval Office address," the book said. "At first, some aides had no idea who was speaking. It soon became clear the voice belonged to Hunter Biden, who the White House staff had not known was on the call. Siskel expressed some concern about the appearance of using the Oval Office."

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"Hunter snapped back: ‘This is one of the most consequential decisions the Supreme Court has ever made.’ He said his father had every right to use the powerful imagery of the Oval Office to deliver that message," the book said. "They later settled on the Cross Hall, the long hallway on the first floor of the White House. After the call ended, Siskel told colleagues. Hunter’s presence was inappropriate."

Biden ultimately delivered a brief speech responding to the Supreme Court’s ruling and took no questions from the press, per the suggestion of his son, the book claimed.  

Siskel and a spokesperson for Biden did not immediately respond to requests for comment from Fox News Digital. 

On July 1, 2024, the Supreme Court issued a 6–3 ruling in Trump v. United States that former presidents have significant immunity from prosecution for acts they committed in an official capacity. The case made its way to the Supreme Court after Trump faced charges stemming from then-Special Counsel Jack Smith’s investigation into whether Trump was involved in the Jan. 6, 2021, Capitol riot and engaged in any other alleged election interference. 

Trump pleaded not guilty to all charges, and claimed a former president could not face a prosecution without a House impeachment and a Senate conviction. 

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The book "2024" is one of several that have been released in this year detailing Biden’s mental deterioration while in office and how Trump won the election. It is authored by Josh Dawsey of the Wall Street Journal, Tyler Pager of the New York Times and Isaac Arnsdorf of the Washington Post. 

Another book covering similar material is "Original Sin: President Biden’s Decline, Its Cover-up, and His Disastrous Choice to Run Again," released May 20.

Fox News Digital has written extensively dating back to the 2020 presidential campaign about Biden's cognitive decline and his inner circle’s alleged role in covering it up.

According to Dawsey, Hunter Biden’s involvement in his father’s affairs as president was not out of the ordinary during the former president’s time in office. 

"What we found out over the course of reporting for our book is, Hunter Biden (was) a major figure in the president's orbit," Dawsey said in a Sunday interview with ABC's "This Week." "He was often on these calls, he would pipe in to calls, he was helping him make campaign decisions, and the president was very concerned about his son. It was one of the things that was an albatross on him as he tried to run for re-election."

A French Olympic fencer’s contaminated kiss defense was enough on Monday for the Court of Arbitration for Sport (CAS) to clear her of a doping allegation.

The World Anti-Doping Agency (WADA) asked for Ysaora Thibus to be banned from competition for four years after she tested positive for the anabolic substance ostarine in January 2024. An International Fencing Tribunal initially cleared Thibus, allowing her to compete in the Paris Olympics. 

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However, WADA challenged the explanation that Thibus was contaminated "through kissing with her then partner, who had been using a product containing ostarine without her knowledge," the CAS said.

The CAS cleared Thibus after judges accepted that she was contaminated by kisses from her American partner over a period of nine days.

The court said on Monday, "it is scientifically established that the intake of an ostarine dose similar to the dose ingested by Ms Thibus’ then partner would have left sufficient amounts of ostarine in the saliva to contaminate a person through kissing."

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CAS judges "accepted that Ms. Thibus’ then-partner was taking ostarine from Jan. 5, 2024, and that there was contamination over nine days with a cumulative effect."

Thibus’ partner at the time was Race Imboden – a two-time Olympic fencing bronze medalist for the U.S.

Thibus finished fifth in the women’s team foil in Paris Olympics and 28th in the women’s individual foil. She was a silver medalist in the women’s team foil event in the Tokyo Games.

She won a world championship in 2022 in individual foil.

The Associated Press contributed to this report.

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