Miller, who first came into the spotlight defending facts during the Duke lacrosse scandal, began the interview, saying that the book contained incorrect information and misrepresented the president's intellect and competency.
Miller, in turn, scolded Tapper for making "condescending" and "snide" remarks and bashed CNN for airing "24 hours of negative, anti-Trump, hysterical coverage". "I get it - there is one viewer that you care about right now and you're being obsequious, you're being a factotum in order to please him", Tapper said, ending the interview.
The interview became increasingly hostile as Mr Miller opted to attack CNN instead of answering questions about Mr Trump's fitness to be president. My question is, but they thought you were a threat.
Tucker then expressed great dismay that "there was a video apparently taken, without your knowledge" - meaning the few seconds where Miller kept shouting after Tapper went to commercial - and a transcript of that exchange was leaked. Bannon was chief executive of Trump's campaign and chief strategist at the White House, before he left August 18, 2017. He also lauded Trump as a "political genius".
The two talked over and past each other before Tapper cut off the interview, stating he has "wasted enough of my viewers' time".
Tapper interrupted Miller there, saying, "I'm sure he's watching and he's happy that you said that".
After a few more exchanges like this, Tapper made a decision to cut Miller off for good.
"The book is best understood as a work of very poorly written fiction, and I also will say that the author is a garbage author of a garbage book", Miller said on CNN's "State of the Union".