WATCH: Trump backer desperately tries to avoid revealing who told him to talk to Michael Wolff

David Bossie, who served as deputy campaign manager for Donald Trump's presidential campaign, admitted on Fox News Monday that he did talk with journalist Michael Wolff for his bestselling book "Fire and Fury: Inside the Trump White House."

However, when asked who had encouraged him to speak with Wolff for the book, Bossie suddenly clammed up and desperately tried to avoid admitting that former Trump campaign chief Steve Bannon was the guilty party.

"Did someone tell you to sit down with him?" asked host Bill Hemmer during his interview with Bossie. "How did that come about?"

"I sat down with him," acknowledged Bossie. "I had really not been interested in sitting down with anybody about any book, mostly because Corey Lewandowski and I were writing our own. I found very little value wanting to sit with him. What he has turned out, this book, is just -- the National Enquirer on steroids and that's all I consider it."

Hemmer refused to let Bossie off the hook, however, and pressed him repeatedly to answer who asked him to talk with Wolff.

Eventually, Bossie relented and admitted it was Bannon.

"It was Steve and I had a conversation about it and he asked me to sit down with him," he said.

"Your office in Trump Tower was right next to Steve Bannon," Hemmer replied. "Why would Steve Bannon bring in such an outsider, let's say, to write this?"

"I haven't talked to Steve about that and I don't know why he would have allowed this," he said. "However, there are other people who spoke to this person within the White House, within the administration. And they have some explaining to do as well."