Elon Musk Shares Manipulated Harris Video, in Seeming Violation of X’s Policies

Elon Musk, the world’s richest man, has waded into one of the thorniest issues facing U.S. politics: deepfake videos.

On Friday night, Mr. Musk, the billionaire owner of the social media platform X, reposted an edited campaign video for Vice President Kamala Harris that appears to have been digitally manipulated to change the spot’s voice-over in a deceptive manner.

The video mimics Ms. Harris’s voice, but instead of using her words from the original ad, it has the vice president saying that President Biden is senile, that she does not “know the first thing about running the country” and that, as a woman and a person of color, she is the “ultimate diversity hire.”

In addition, the clip was edited to remove images of former President Donald J. Trump and his running mate, Senator JD Vance of Ohio, and to add images of Mr. Biden. The original, unaltered ad, which the Harris campaign released on Thursday, is titled “We Choose Freedom.”

The version posted on X does not contain a disclaimer, though the account that first uploaded it Friday morning, @MrReaganUSA, noted in its post that the video was a “parody.” When Mr. Musk reposted the video on his own account eight hours later, he made no such disclosure, stating only, “This is amazing,” followed by a laughing emoji.

Mr. Musk’s post, which has since been viewed 98 million times, would seem to run afoul of X’s policies, which prohibit sharing “synthetic, manipulated or out-of-context media that may deceive or confuse people and lead to harm.”