WATCH: Karine Jean-Pierre’s reaction to Biden’s private admission of being ‘tired’ at 80.

Is President​ Biden “Tired”? White House Press Secretary Responds

White House press secretary ‌Karine ‌Jean-Pierre on Wednesday brushed off ⁣a new book’s⁣ assertion that ⁢80-year-old President Joe Biden privately admits he’s⁣ “tired.”

The Daily Mail’s ⁤Rob Crilly ‍asked Jean-Pierre if the president’s⁤ tiredness⁢ is causing the White House to call press lids early in⁤ the morning.

“I mean, that’s a ridiculous assumption to make,” Jean-Pierre said. “That’s ⁤a ridiculous assumption to make.”

In private, Biden has ​admitted that “he felt tired,” according‍ to Franklin Foer’s new book The Last ⁤Politician, excerpts of which were published Tuesday in the ​ Guardian. Foer, a liberal journalist‍ and former editor at the New Republic, said⁤ it⁤ was “striking” that the ⁤president “took so few ​morning meetings or presided over so few public events before 10am.”

Biden’s “jean-pierre-responds-to-report-that-biden-80-privately-admits-hes-tired/” title=”WATCH: Karine Jean-Pierre’s reaction to Biden’s private admission of being ‘tired’ at 80.”>public persona reflected physical decline and⁢ time’s dulling of mental faculties that‍ no pill or exercise regime ⁤can resist,” Foer wrote, citing a “tight inner circle” of the president’s advisers. “His advanced years were a hindrance, depriving him of the ⁢energy to cast a robust⁣ public presence ​or⁤ the​ ability to easily conjure a name.”

The ⁢ Guardian report came⁢ one day after the Associated⁣ Press released a poll ‌that found Americans overwhelmingly say Biden is too old​ for ​his job. Seventy-seven percent of voters, including 69 percent of Democrats, ‌said Biden’s‌ age leaves him⁢ unable to​ “effectively⁣ serve” as president.

CNN’s Jake Tapper‍ on ⁣Tuesday attempted ‌ to push Jean-Pierre about the AP poll. The press ‍secretary responded by touting the president’s ‌record, leading Tapper to ‍criticize her for not ⁣answering the‌ question.

Those reports mark the⁣ latest time that left-leaning media⁣ have wavered on Biden because of ‌his age. The New ‌York Times in June‌ published a​ long article‌ on how Biden has ⁣become ⁢”slower” and “more prone to occasional lapses of memory.”

Among Democratic Party donors, Biden’s‌ age‍ “was all ⁤anyone ‌was talking about,” one ⁣source told the Times.