President Donald Trump once abandoned a former aide at McDonald’s because his order took too long.

The anecdote was a part of a new tell-all campaign book written by former top Trump campaign aides Corey Lewandowski and David Bossie.

The former aide who was abandoned at McDonald’s, Sam Nunberg, would later claim to make up his own viral story about a McDonald’s order and Republican New Jersey Gov. Chris Christie.

Two of President Donald Trump’s former top campaign aides said in an upcoming tell-all book on the election run that the then-Republican candidate once abandoned an aide at a McDonald’s because his custom burger order was taking too long.

It just so happened that the former aide Trump reportedly left behind, Sam Nunberg, was the same operative who would later claim to invent what was a viral story about Republican New Jersey Gov. Chris Christie fetching Trump’s McDonald’s order.

In the upcoming book “Let Trump Be Trump,” which was provided to The Washington Post ahead of its release, authors and top former Trump campaign aides Corey Lewandowski and David Bossie wrote that Nunberg was intentionally left behind at a McDonald’s because his custom order was taking too long.

“Leave him,” Trump said. “Let’s go.”

In June 2016, The New Yorker’s Ryan Lizza wrote in a parenthetical: “One Republican told me that a friend of his on the Trump campaign used Snapchat to send him a video of Christie fetching Trump’s McDonald’s order.”

Nunberg claimed that he invented that tale to embarrass the governor. He made the claim in a lengthy Politico story on Christie last month .

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“The sad reality is that it was believable,” he said, laughing.

Lizza later tweeted that Nunberg had not been his source for the anecdote, and said Nunberg’s claim that he invented the story was “incorrect.”

At the time, Brian Murray, a Christie spokesman, called the McDonald’s anecdote a “completely invented scenario” in an email exchange with Business Insider.

“We categorically deny this ridiculous, completely invented scenario, which the writer attributed to an unnamed source’s anonymous friend,” Murray said. “The fact the writer relegated this bit of sleaze between parentheses certainly indicates he knew it was trash that had to be separated from the rest of the story.”