White House senior adviser Stephen Miller on Sunday slammed a new book about President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE and his administration, calling it a “grotesque work of fiction” and a “pile of trash.”

“It's tragic and unfortunate that Steve would make these grotesque comments so out of touch with reality and obviously so vindictive and the whole White House staff is deeply disappointed in his comments, which were grotesque,” Miller told CNN’s “State of the Union.”

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Miller was referring to former White House chief strategist Stephen Bannon, who is quoted in Michael Wolff’s “Fire and Fury: Inside the Trump White House” as calling a meeting between Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE and a Russian lawyer “treasonous” and “unpatriotic.”

The White House and President Trump have denounced Bannon and the book since excerpts began leaking last week.

“And the tragic thing about this book, and there are many things about it that are unfortunate, but the portrayal of the president in the book is so contrary to reality, to the experience of those who work with him, to my own experience having spent the last two years with him,” Miller said on Sunday.

Miller described Wolff as a "garbage author of a garbage book."

Revelations in the book and comments from administration staffers have consumed Washington since excerpts began leaking last week.