Vice-president Mike Pence is one of many senior officials who have denied writing the piece. "To the writer of the oped - you are not protecting this country, you are sabotaging it with your cowardly actions". He called the opinion piece "sad".
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But the speculation over the author's identity was not limited to the White House - much of Washington was also buzzing with rumours and speculation.
"I come from a place where if you're not in a position to execute the commander's intent, you have a singular option, that is to leave", he said.
In addition to the single source, Schrader said this must put "news staff at the New York Times in an incredibly hard position" because they will most likely want to investigate and report who this source is.
At Thursday's rally, Trump said his administration had "discredited" Woodward's forthcoming book.
Sen. Rand Paul (R-Ky.), meanwhile, advised President Trump to start giving lie detector tests throughout the administration. "It's national security. I would say Jeff should be investigating who the author of that piece was because I really believe it's national security". Meadows is the chairman of a House subcommittee that oversees the president's executive office and a founder of conservative Freedom Caucus.
Trump described the writer of the opinion piece as someone "probably who is failing and probably here for all the wrong reasons".
Asked if he'd take action against the Times, Trump said "we're going to see, I'm looking at that right now".
As one high level administration official after the other released scathing statements denying they were the wordsmith culprit, Trump appears to have bought the rebuttals.
Trump immediately slammed as "gutless" the unsigned op-ed - published a day after excerpts from bombshell book claiming that White House staff were constantly battling to rein in the president's worst impulses. "I hope [Trump] knows - maybe he does? - that there are dozens and dozens of us".
"It may be cold comfort in this chaotic era, but Americans should know that there are adults in the room". "We fully recognize what is happening". We all remember how everyone ignored that "covfefe" typo, right?
Mr. Trump has fumed about the anonymous op-ed that was first published online Wednesday. He also tweeted about it shortly after.
-Associated Press writer Zeke Miller.
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