When questioned about the president's credibility in light of the New York Times op-ed and a recent poll that found Trump's ratings on character traits such as honesty and intelligence from voters fell to their lowest number since November 2016, Sanders said she would rather take "take the actual on record account" from White House staffers than from "disgruntled former employees that refuse to put their name on things".
In the wake of a scathing New York Times op-ed written by an anonymous senior member of the Trump administration, officials say the president's paranoia and distrust of his own staff are deepening.
Trump retweeted himself from last week, saying, "The Woodward book is a scam".
However bad you fear the situation might be inside the Trump White House, the reality is even worse, says Bob Woodward, half of the duo behind the Watergate tapes, and the author of Fear: Trump in the White House, out Tuesday.
Sanders wouldn't rule out a lawsuit against Woodward on Monday, though Trump has long threatened legal action against his detractors that never materializes.
"I think it is less about that part of it and whether or not somebody is actively trying to undermine the Executive Branch of the government and a duly elected president of the United States", Sanders said.
But on NBC's "Today" program Monday, Woodward said that the denials issued by chief of staff John Kelly and Secretary of Defense James Mattis about quotes in his book are not truthful. "When no effort was made, it seems like a very careless and reckless way to write a book".
"It's critical: Who is this person and why are they masking themselves in this way?" asked Woodward in the interview.
The 75-year-old Woodward said that at a National Security Council meeting a year into Trump's presidency, when he was complaining about the cost of posting thousands of USA troops in foreign countries, Secretary of Defense Jim Mattis had to explain the rationale to him.
President Trump has repeatedly denounced Woodward's book, calling the veteran journalist an "idiot" and his work a piece of "fiction".
"The incidents are not anonymous", Woodward said.
Woodward and Carl Bernstein led The Washington Post reporting team that investigated the 1972 break-in at the Watergate hotel, which eventually led back to the White House, prompting a scandal that forced Nixon to resign in 1974. None of these terms existed prior to Mr. Trump so one can say he created them in order to justify his campaign?
The source, while citing demeaning views of Trump from other unnamed senior officials, declined to say how many officials had actually taken this vow of resistance, or when and how they had taken this vow. Woodward said, adding that the comments by the administration officials "are political statements to protect their jobs".