Someone with direct knowledge of the Trump White House believes she may know the source of the anonymous New York Times op-ed, claiming to be part of an internal resistance to stop the President from doing things that could harm the country.

In an exclusive interview with WSB Radio’s Condace Pressley, Omarosa Manigault Newman says, “I suspect it's someone on [Vice President] Pence's staff.”

She adds, “He [Pence] has three senior staffers, assistants to the president, deputy assistants to the president, who would fit the description of this person.”

Refuting the accusations, the deputy chief of staff for Vice President Pence tweeted: “The Vice President puts his name on his op-eds. Our office is above such amateur acts.”

In her own-tell all book about the Trump White House, "Unhinged," Omarosa says she saw a "mental decline" in President Trump during her 7-month tenure.

The book has spent the past two weeks at the top of the New York Times bestseller list. "I wanted to give the American people a chance to know the truth, because the truth so matters,” she tells WSB Radio.

Omarosa says when she read the op-ed, "I really thought about the implications for, not just the White House, or for the president, but for the American people."

An effort is underway at the White House to find out who wrote the piece for the New York Times.

U.S. Secretary of State Mike Pompeo has also denied writing it. Speaking to reporters in New Delhi, Pompeo said, "It's not mine," and accused the media of trying to undermine the Trump administration.

When asked about the anonymous editorial, President Trump called it "gutless."