(CNN) President Donald Trump said Thursday that The New York Times' decision to publish an op-ed from a senior administration official describing an internal resistance to the President could be called "treason."

In an interview that is slated to be aired Friday morning on Fox News but was piped into the sound system at the rally and could be heard by reporters, Trump said the Times never should have run the piece.

"Well, number one, the Times never should have done that, because really what they've done is virtually, you know, you could call it treason, you could call it a lot of things, but to think you have somebody in all of the Cabinets -- so many people, as you know," Trump said. "They came forward, they're writing editorials, they're all saying, you know, it's got to be at a fairly low level."

The Times published an anonymous op-ed from a senior administration official Wednesday alleging there is an internal resistance to the President from his own aides. The author wrote that people within the administration are acting out of duty to the country because the "president continues to act in a manner that is detrimental to the health of our republic."

The op-ed has set Washington alight, with gossip spreading across the capital about who the author could be. So far, more than 25 administration officials have denied being the writer. It came a day after excerpts from an upcoming book by veteran journalist Bob Woodward published, portraying a White House beset by chaos. Woodward reported at least one Trump official hid a document from the President out of fear that he would sign it.

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