Trump fired off a pair of tweets attacking Post reporter Dave Weigel over a "phony photo" of an empty arena ahead of his Friday rally in Pensacola, Florida.
The Washington Post later released a statement admitting that Weigel used "an inaccurate image" in his tweet about the Trump rally.
The President had earlier told his 45 million followers: "Packed house, many people unable to get in. FAKE NEWS, he should be fired", Trump tweeted on Saturday night, despite the fact that Weigel had already corrected the tweet before the president's follow-up post. They never apologize. Maybe that comes from being president, I don't know. He said he removed the tweet, which showed numerous empty seats ahead of Trump's speech, after being alerted by the Daily Mail's David Martosko that he'd "gotten it wrong".
But Trump wasn't ready to forgive and forget and called for the reporter to be fired.
The president's tweets seeking to undermine the media have been a mainstay of his first year in office.
"The president replied: "@daveweigel of the Washignton Post just admitted that his picture was a FAKE (fraud?) showing an nearly empty arena last night for my speech in PEnsacola when, in fact, he knew the arena was packed (as shown also on T.V.).
The Post reporter, who previously wrote for the libertarian publication Reason magazine, admitted to his mistake and issued an apology after the president called him out on Twitter. "And when he was later addressed by the president on Twitter, he promptly apologized for it". "Was confused by the image of you walking in the bottom right corner", he tweeted.
The new information, CNN noted, "indicates that the communication is less significant than CNN initially reported".
Meanwhile, it has emerged that Weigel resigned from the Washington Post in 2010 after being caught posting caustic remarks about Republican Congressman Ron Paul and conservative media personalities on a private email list. "They apologized", Trump said, adding sarcastically, "Oh thank you, CNN, thank you so much".
It was at that rally that Trump seized on the CNN mistake.
During the Pensacola rally, the President once again went on the offensive over the media, asking the crowd: "Did you see all the corrections the media has been making?"