Hours before former President Donald J. Trump spoke at a rally in New York last week, rumors started circulating online that a bomb had been discovered nearby. While the report was debunked, Elon Musk nonetheless amplified it in a post to his nearly 200 million followers on X.
It was among dozens of false or misleading posts that Mr. Musk shared on the platform from Monday to Friday last week — after both the second presidential debate and the second apparent assassination attempt on Mr. Trump. In 171 posts and reposts during that frenetic five-day period, the tech mogul railed against illegal immigration, boosted election fraud conspiracy theories and attacked Democratic candidates, according to a New York Times analysis.
Experts who monitor falsehoods and conspiracy theories have long feared that Mr. Musk would use his ownership of X to further pollute the online ecosystem. Since he bought the platform known as Twitter in 2022, he has shown a willingness to elevate unfounded claims as he has embraced a more conservative political posture, including by endorsing Mr. Trump’s presidential campaign in July.
Nearly a third of his posts last week were false, misleading or missing vital context. They included misleading posts claiming Democrats were making memes “illegal” and falsehoods that they want to “open the border” to gain votes from illegal immigrants. His misleading posts were seen more than 800 million times on X, underscoring Mr. Musk’s unique role as the platform’s most-followed account and a significant source of its misleading content.
Mr. Musk did not respond to requests for comment.
Mr. Musk posted plenty of jokes and memes to X last week. But his political opinions and misleading posts often garnered the most attention.