"If they are a senior administration official, that they are violating an oath, not to the president, but to the Constitution".
Some Democrats, meanwhile, argued that the op-ed and Trump's response to it are proof that he is not fit to serve.
The Times described the author as "a senior official in the Trump administration whose identity is known to us and whose job would be jeopardized by its disclosure". 4th ROW (L-R) Secretary of Labor Alexander Acosta, US Secretary of Agriculture Sonny Perdue, US Secretary of Transportation Elaine Chao, Acting EPA Administrator Andrew Wheeler, US Trade Representative Robert Lighthizer.
"That is one of the reasons why I think you're seeing not only Republican members, but what appears to be a lot of folks in the White House, have real concerns about this president's stability", Warner added.
"Let me be very clear". I'm 100 per cent confident that no one on the Vice-President's staff was involved in this anonymous editorial.
"I know my people", Pence said on "Face the Nation".
"To have an individual who took that oath - literally say that they work every day to frustrate the president advancing the agenda he was elected to advance, is undemocratic".
Speaking on US TV, Mr Pence said it would be for the president to decide if lie detectors should be used to find the culprit. "I know my people, Margaret".
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Reynolds was last seen publicly in April at the Tribeca Film Festival, where he was helped onto the red carpet by Robert De Niro . At Palm Beach Junior College one of his English teachers Watson B.
He restated that he thinks the essay writer should do the "honorable thing and resign".
Mr Trump has said the US Justice Department should investigate and unmask the anonymous author. But it would not be unprecedented for a member of the national security team to buck the president, according to a book to be published next week by the reporter Bob Woodward. The book, "Fear: Trump in the White House", is scheduled to be formally released Tuesday, all but ensuring that the debate over Trump's leadership ability and style will extend into a second straight week.
As MSN reports, Omarosa shares the opinion of various internet sleuths, saying that she believes the writer of the damning editorial about the Trump White House is none other than Vice President Mike Pence.
Pence said during a taped Fox News Sunday interview: "I would agree to take it in a heartbeat and would submit to any review the administration wanted to do".
Vice President Pence speaks to airmen during a visit to Nellis Air Force Base in Las Vegas on September 7, 2018.
Both also said they had no idea who wrote the piece.
Pence also spoke to Fox News Sunday.