Tapper was referring to Miller's boss, President Donald J. Trump. In the book, however, Bannon is quoted as saying that Mueller's investigation would probably focus on money laundering and that "they're going to crack Don Junior like an egg on national TV".
"It is not an exaggeration or unreasonable to say this is 25th Amendment kind of stuff", Wolff said.
"Leaving Camp David for the White House".
"We urge that those around him, and our elected representatives in general, take urgent steps to restrain his behaviour and head off the potential nuclear catastrophe that endangers not only Korea and the United States but all of humankind", they wrote. "The 25th Amendment concept is alive every day in the White House".
The statement, one person close to him said, was as much about stanching the defections of supporters and potential backers as it was about appeasing the president. "It's how to look away, how not to confront", he said.
British Prime Minister Theresa May dismissed concerns about Mr Trump's mental state after the book's publication, saying the President would still be visiting the United Kingdom in the future.
Miller and Bannon were once thought to be kindred spirits - both hard-liners on immigration who sought to exploit Trump's populist rhetoric to advance a nationalist agenda.
Hot air balloon carrying tourists in Egypt crashes
Interested in Egypt? Add Egypt as an interest to stay up to date on the latest Egypt news, video, and analysis from ABC News. The incident was caused by strong winds that forced the balloon off its course above the city's temples and tombs.
At another moment during the interview, Miller discussed Steve Bannon, saying, "It's tragic and unfortunate that Steve would make these grotesque comments so out of touch with reality and obviously so vindictive". But as Bannon began to lose favour in the West Wing, Miller reportedly realigned himself with a faction led by Trump's son-in-law, Jared Kushner, and daughter Ivanka Trump. "Why don't you just give me three minutes to tell you about the Donald Trump that I know".
Wolff was granted unusually wide access to the White House during much of Trump's first year at the behest of former Trump strategist Steve Bannon, who advised the president during his first months in office and during his presidential campaign.
Tapper grew exhausted of Miller repeating pro-Trump and anti-Bannon talking points and called the aide's constant interruptions "hysterical, ' as he cut the interview short by announcing, 'I think I've wasted enough of my viewers" time'.
"Welcome back to planet Earth", Tapper said to viewers after the show returned.
Miller ducked Tapper's other questions about Trump's recent tweets, Bannon's influence on Trump's presidency and policy and a New York Times report in September 2017 that Miller in May helped compose a list of reasons to fire James Comey as director of the Federal Bureau of Investigation.
Watch the clip above, via CNN.