Daniel Dale, the Washington correspondent for the Toronto Star, on Sunday called President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE a "serial liar" and said Trump's lies in recent weeks have been unprecedented.

"These are not simply the usual exaggerations of a crowd size and so on. He's making stuff up in the last couple weeks in a way that I don't think we've seen, even from a serial liar, the president, before," Dale said during an appearance on CNN's "Reliable Sources."

Dale, who often live tweets Trump's comments during his campaign rallies and frequently calls out Trump for lying, also called on other members of the press to describe Trump's false and misleading claims plainly as "lies."

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“I think if we want to regain the trust that has been lost in media, we have to level with readers, we have to be seen to be straight shooters. And I think in those cases the word is ‘lie,’” Dale said.

"These are not simply the usual exaggerations of a crowd size and so on. He's making stuff up in the last couple weeks in a way that I don't think we've seen from a serial liar, the President, before": @ddale8 says Trump's rhetoric before the midterms includes some "whoppers" pic.twitter.com/tKjKFmX9ve — Reliable Sources (@ReliableSources) November 4, 2018

The Washington Post’s fact-checker Glenn Kessler used the term “lie” in August for the first time in reference to a statement from President Trump.

"How to characterize Trump’s statements has become its own pitched political battle, with many of the president’s critics demanding that they be called ‘lies,’” Kessler wrote at the time. "The Fact Checker has been hesitant to go that far, as it is difficult to document whether the president knows he is not telling the truth."