Washington (CNN) In 2017, when White House turmoil was at its peak, President Donald Trump created an "enemies list" made up of members of his own administration, a former White House communications aide writes in a new book, according to Axios.

In Cliff Sims' book, "Team of Vipers: My 500 Extraordinary Days in the Trump White House" set to be released later this month, Sims writes that in a meeting with the two of them, Trump asked Sims who he thought was the source of leaks to the media, Axios reported Friday.

"'Give me their names,' he said, his eyes narrowing. 'I want these people out of here. I'm going to take care of this. We're going to get rid of all the snakes, even the bottom-feeders,'" Sims writes, according to the excerpt published by Axios.

CNN has reached out to the White House and Sims.

The excerpt continues with Sims saying that it wasn't until after the fact that he realized "how remarkable this was."

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