He also spared no love for Trump's daughter and son-in-law, Ivanka Trump and Jared Kushner.
Miller, in his defense of the president, called him a "political genius" who could rattle off complete paragraphs on the fly in response to news events and then deliver them "flawlessly" to a campaign audience.
Manafort should have know the Russians "are duplicitous, cunning and not our friend", Bannon said.
"Not only do I think [the tweets] help, but I think in the toxic environment that you've created here in CNN and cable news, which is a real crisis of legitimacy for your network - and we saw it, of course, with the extremely fake news that you reported about the Don Jr. and WikiLeaks story".
The White House has been on the defensive since excerpts of the book were published last week with the president and his aides scrambling to discredit both its portrayal of Trump and the author's methods.
He said that Ronald Reagan had had the same problem and "handled it well", adding: "So will I!"
Minutes after Stephen Miller's crazed, outrageous, and unhinged appearance on CNN Sunday morning, defending President Trump and attacking author Michael Wolff, the president himself applauded his policy advisor's performance.
He also claimed that the book was a "work of fiction". Tapper responded that that "wasn't true", and he had a lot of questions about immigration, and accused Miller of "filibustering".
In the past, Pompeo has described Trump as engaged with the intelligence in his briefings, and said part of Trump's preferred briefing method involves visual aids and "killer graphics".
Miller tried to protest, but Tapper quickly said, 'Thank you Stephen.' The camera panned away from the White House aide as Tapper started reading from the teleprompter, readying his audience the next segment. "We didn't have an interview".
Trump has been an "active, engaged and effective leader", said Senator Tom Cotton, a Republican from Arkansas, on ABC's "This Week".
Steve Bannon has expressed regret over his Trump tales, following a war of words with the U.S. president.
Miller downplayed Bannon's role in Trump's campaign and at the White House during the early months of the administration as "greatly exaggerated".
Miller accused CNN of "anti-Trump hysterical coverage" following the Friday release of the book, which portrays Trump, a former reality TV start who took office almost a year ago, as mentally unstable and unfit for the demands of his job.