WATCH: Vice President Mike Pence said in an interview on Face the Nation on Sunday that he was "100 per cent" sure no one on his staff wrote the opinion piece which criticized President Donald Trump.

Vice-President Mike Pence says he’s “100 per cent confident” that no one on his staff was involved with the anonymous New York Times column criticizing President Donald Trump’s leadership.

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“I know them. I know their character,” Pence said in a taped interview aired Sunday by CBS’ Face the Nation.

Some pundits had speculated that Pence could be the “senior administration official” who wrote the opinion piece because it included language Pence has been known to use, like the unusual word “lodestar.” The op-ed writer claimed to be part of a “resistance” movement within the Trump administration that was working quietly behind the scenes to thwart the president’s most dangerous impulses.

Pence added his staff to the list of more than two dozen high-ranking administration officials who have denied writing the column.

WATCH: Pence says he’s not sure if ‘lodestar’ term used in op-ed was meant to set him up

“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. “They get up every day and are dedicated, just as much as I am, to advancing the president’s agenda and supporting everything … President Trump is doing for the people of this country.”

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Asked whether he had asked his staff about the op-ed, Pence said, “I don’t have to ask them because I know them. I know their character. I know their dedication and I am absolutely confident that no one on the vice-president’s staff had anything to do with this.”

He restated that he thinks the essay writer should do the “honourable thing and resign.”

Publication of the op-ed followed the release of stunning details from an upcoming book by Watergate reporter Bob Woodward in which current and former aides referred to Trump as an “idiot” and “liar” and depicted him as prone to rash policy decisions that some aides either work to stall or derail entirely.

Both releases are said to have infuriated Trump, who unleashed a string of attacks on Woodward’s credibility and dismissed the celebrated author’s book as a “work of fiction.” Some of the officials featured in the book’s anecdotes about the president, including Defence Secretary Jim Mattis and White House chief of staff John Kelly, issued statements denying the comments attributed to them by Woodward.

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WATCH: Mike Pence calls op-ed slamming Trump administration a ‘new low in journalism,’ denies being author.

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