After years of the media attempting to keep the obvious a secret, multiple new books from reporters are now predictably confirming what most Americans realized long ago -- former President Joe Biden was operating in the White House with substantially diminished cognitive capabilities.

Now, as Biden's poor mental health condition is further revealed, one former campaign staffer says she feels like she was "lied to" by the president's team about his "unacceptable" state, Fox News reported.

The staffer was reacting to quotes from a former top aide who admitted that Biden's inner circle was fully aware before the disastrous debate that the elderly president was "out of it" and mentally incapable of running a campaign or governing the country but kept that information to themselves.

Book describes how "out of it" Biden really was

The Guardian obtained an advance copy of journalist Chris Whipple's new tell-all book, Uncharted: How Trump Beat Biden, Harris, and the Odds in the Wildest Campaign in History, which purports to share some of the behind-the-scenes happenings of the 2024 campaign season.

One part of that book is focused on Biden's debate preparations with then-White House chief of staff Ron Klain, who acknowledged that the president "was fatigued, befuddled, and disengaged," and accurately predicted that the debate would be a "nationally televised disaster."

When debate prep with Biden first began, Whipple wrote, Klain "was startled. He’d never seen him so exhausted and out of it. Biden was unaware of what was happening in his own campaign. Halfway through the session, the president excused himself and went off to sit by the pool," where he promptly fell asleep while his aides waited for him to return.

Klain, per Whipple, lamented that Biden often appeared "perplexed," "out of touch" with the current reality, that he was "obsessed" with the opinions of foreign leaders and NATO, and that he was incapable of making any cogent arguments for why he should be re-elected to a second term, among other revealing complaints about the ex-president.

"Unacceptable" cover-up

Whipple's new book was discussed on a recent CNN segment, according to Fox News, during which host Abby Phillip asked former Biden campaign staffer Ashley Allison if she felt like she'd been "lied to" by the president's inner circle amid the damning revelations.

"Yes. I think I hadn't been around the president before that debate, and I worked for Joe Biden," Allison replied. "And if the people around him knew that he was not capable, it is unacceptable to me that they allowed him to go onto that stage. I deserve better as a voter, not even as a Democrat, as a voter and as an American, I do."

The former staffer later reiterated, "What we are hearing right now is unacceptable to me, and I am a Democrat."

"That night of the debate was terrifying for many, many, it was scary. It hurt my heart, but it was very clear that that might not have been the first time," she added of Biden's obviously diminished capabilities. "And I find that -- I find that unacceptable. I would find that unacceptable in a Trump administration, in an Obama administration, in a Bush administration, and in a Biden administration."

Inner circle "in a fog of delusion and denial"

Last week, Politico's Playbook reported on several new tell-all books set to be released in the coming weeks that promise to reveal the true extent of former President Biden's mental decline, including the "Uncharted" tome from Whipple.

Whipple told the outlet about his book, "I have fresh reporting on an hour-by-hour, day-by-day basis of Biden’s final days, and obviously his decline is a major part of the story."

"I happen to think that to call it a 'cover-up' is simplistic. I think it was stranger and way more troubling than that," the author added. "Biden’s inner circle, his closest advisers, many of them were in a fog of delusion and denial. They believed what they wanted to believe."