And another...

former White House staff secretary Rob Porter 

Porter on Tuesday offered a forceful defense of the president, saying Trump "invites robust discussion and asks probing questions" and reiterating that Trump is ultimately "the one who decides" on his administration's policy.

In one episode from Woodward's book, Cohn is described as having surreptitiously snatched a draft letter off Trump's desk that would have terminated a trade deal with South Korea. Trump has disputed this account, saying Cohn "would have been fired so fast" if he had swiped the memo.

"As Staff Secretary, I was responsible for managing the flow of documents to and from the Oval Office and ensuring that anything the President was asked to sign had been properly vetted," Porter said in a statement. "The suggestion that materials were 'stolen' from the President’s desk to prevent his signature misunderstands how the White House document review process works — and has worked for at least the last eight administrations." "During my time in the White House, I sought to serve the President’s best interests and to help enable his many successes — successes that Mr. Woodward’s book ignores," Porter said.

Porter also suggested that his role transmitting various government papers and staffers' opinions to the president did not constitute a superseding of Trump's authority — the type outlined last week in a New York Times op-ed by an anonymous senior administration official who claimed "a quiet resistance" was working against Trump from within the executive branch.