The president denied the existence of one of his own senior officials who spoke to dozens of reporters during a White House–sanctioned background briefing on North Korea.

President Trump on Saturday falsely accused the New York Times of using a phony source in a story about the North Korea summit, when in fact the source was a senior administration official who was sanctioned by the White House to give reporters a background briefing. The Failing @nytimes quotes “a senior White House official,” who doesn’t exist, as saying “even if the meeting were reinstated, holding it on June 12 would be impossible, given the lack of time and the amount of planning needed.” WRONG AGAIN! Use real people, not phony sources.

The president was referring to a Times story published on Friday about the canceled summit with North Korean leader Kim Jong Un in Singapore on June 12. Trump told reporters on Friday that the summit may be back on, just one day after he called off the meeting in a dramatic letter to the North Korean leader. "We’ll see what happens. We are talking to them now,” Trump said. “They very much want to do it. We’d like to do it.” He also referred to Kim's “very nice statement” on Friday, saying “we'll see what happens" and suggested that meeting "could even be the 12th.”

Trump also tweeted Friday that the summit, if it does go ahead, will "likely remain in Singapore on the same date, June 12th." We are having very productive talks with North Korea about reinstating the Summit which, if it does happen, will likely remain in Singapore on the same date, June 12th., and, if necessary, will be extended beyond that date.

This was the part from the Times' story that Trump took issue with on Saturday: As with so many issues involving this president, the views of his aides often have little effect on what he actually says. On Thursday, for example, a senior White House official told reporters that even if the meeting were reinstated, holding it on June 12 would be impossible, given the lack of time and the amount of planning needed.

In his tweet on Saturday, the president claimed that the "senior White House official" quoted by the Times "doesn't exist." Evan Vucci / AP

Immediately, several reporters on Twitter began pointing out that the comments from the source who Trump claimed did not exist were actually made by an administration official during a background briefing on North Korea held by the White House for reporters on Thursday. This is a ridiculous lie about the Times. The senior White House official is not only real - the official said June 12 was extremely unlikely *at an in-person White House briefing to the media* on Thursday. https://t.co/XL3PB9hYdY

Here's the email the White House sent reporters on Thursday advertising the briefing. Here's the White House notice of the briefing at which this senior White House official said June 12 was extremely unlikely to be salvaged. https://t.co/0vEhIq6MCN

So basically, the senior White House official was very much a real person who spoke to reporters during a White House–sanctioned media briefing on Thursday. Chip Somodevilla / Getty Images

The only reason that the Times chose not to name the White House official in its story is because the White House press office "insisted" that the briefing was on background, as one of the story's reporters, David Sanger, pointed out. The reason that this official was not named in our story is that the White House press office insisted that its briefing -- for hundreds of reporters -- was on background. Best way to alleviate the President's concern about anonymous sources would be for WH to name the official. https://t.co/dTKNTbGzJR

Several other reporters who participated in the briefing, either in person or via conference call, confirmed that the official was real, but chose not to identify him to honor the agreement with the White House that the briefing was to be conducted on background. I mean, every reporter on the call knows who this official was, and this official exists. And we all heard the official say it. https://t.co/iEiTEpHeyb

However, Yashar Ali, a New York Magazine and HuffPost writer, identified the official as Matthew Pottinger, the National Security Council senior director for Asian affairs. The official is Matt Pottinger who serves on the National Security Council. He briefed dozens of reporters on background. https://t.co/5FUP7t8nYQ Ali said he identified Pottinger as he was not on the conference call and was thus not bound by the off-the-record agreement. A source who does not work at BuzzFeed News and who participated in the briefing confirmed to BuzzFeed News that Pottinger was the official who spoke. Pottinger did not respond to a request for comment.

Ali also tweeted audio of the briefing in question in which deputy press secretary Raj Shah can be heard instructing reporters to refer to Pottinger as a "senior White House official." 4. I've obtained audio of the WH press briefing. You can hear Raj Shah, Deputy Press Secretary, introduce Pottinger (along with the terms - which are standard) and then Pottinger makes the statement that POTUS says was never made. Lots of reporters in briefing room and on phone. https://t.co/2gEYkRSyTv

In the audio, Shah is heard saying, "This briefing's going to be on background. It's off-camera, not for broadcast. Pottinger here can be referred to as a senior White House official. He's deputy assistant to the president for Asia. And he can take it from here." Pottinger can then be heard saying: There's really not a lot of time. We've lost quite a bit of time that we would need in order to — I mean there's an enormous amount of preparation that's gone on over the past few months in the White House, at State, and with other agencies and so forth, but there's a certain amount of actual dialogue that needs to take place at the working level with your counterparts to ensure that the agenda is clear in the minds of those two leaders when they sit down to meet and talk and negotiate and hopefully make a deal. And June 12 is in 10 minutes and it's gonna be — but the president has said that he some day looks forward to meeting with Kim. So, technically he never said having the summit on June 12 was impossible, as the New York Times Friday piece said, but he did strongly imply that. (A Thursday report from the Times used the same official's quote to suggest that the June 12 meeting was "all but impossible.") According to CBS News, reporters asked for the briefing to be on the record, but were rebuffed. The White House press office did not immediately respond to a request for comment on Saturday.

Reporters pointed how just how messed up the whole situation was. Imagine being the WH background briefer who led this briefing, who now has his boss - the president of the US - saying he/she doesn’t exist. https://t.co/6tYHxp3ZFK

Others urged the president to ask for a transcript of the press briefing that was conducted in his own White House with the press office's approval. FYI, Matthew Pottinger is NSC Senior Director for Asian Affairs, @POTUS. Ask for a transcript of the briefing, done in the White House with the press office's approval. https://t.co/ivnZD7mliB

Some pointed out that reporters always question the White House on why a meeting is being held on background and not on the record. This is a good example of why, at pretty much every background briefing, you'll hear an AP reporter ask why it's being held on background/why it's not on record. https://t.co/EYkrUszieZ

A former Obama official suggested that Trump had "smeared" the reporters who participated in the White House briefing, and wondered if the White House Correspondents' Association would take action. will be interested to see what WHCA does on this as their member organizations are smeared for participating in a sanctioned WH briefing https://t.co/KYhE6c9xJW