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Melania Trump’s lawyer, Charles J. Harder, is threatening a lawsuit over a YouTube video that suggests that Barron, the Trumps’ 10-year-old son, has autism. In a letter obtained by TMZ, Harder confirms that Barron is not autistic and portrays Rosie O-Donnell as a key perpetrator of the false claim.

RELATED: Rosie O’Donnell clarifies her stance after she wondered if Barron Trump had autism

The video counts down a number of common signs of autism and suggests that Barron Trump displays at least some of them: clapping without slapping his hands together and yawning and grimacing during his father’s victory speeches at both the RNC and on election night.

The future first lady’s team says that Barron has only clapped like so once after a long day at the RNC and that the “vast majority of the time, he claps normally.” They also argue that both speeches in question occurred late at night, and that Barron was displaying the normal behavior of a child his age.

Last week, O’Donnell, whose daughter has autism, tweeted out a link to the video, captioned “Is Barron Trump Autistic? #StopTheBullying.”

“Barron Trump Autistic? if so – what an amazing opportunity to bring attention to the AUTISM epidemic,” she tweeted along with the video.

RELATED: Rosie O’Donnell asked if Barron Trump was autistic and now his fans are furious

While O’Donnell didn’t create the video, her platform as a celebrity surely increased its visibility. She has since issued an apology. While he’s not threatening to sue O’Donnell herself, Harder is requesting that whoever created the clip remove it and apologize.

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