Elon Musk Writes, Then Deletes, a Post Musing About Threats to Biden and Harris

Hours after what the F.B.I. called a second attempted assassination of former President Donald J. Trump, Elon Musk wrote on his social media site — and then deleted — a post suggesting it was odd that nobody had tried to kill President Biden or Vice President Kamala Harris.

Mr. Musk said the post on X had been intended as a joke.

In response to a user who asked, “Why they want to kill Donald Trump?” Mr. Musk, who has endorsed the former president and comments frequently on the U.S. presidential campaign, wrote: “And no one is even trying to assassinate Biden/Kamala.” His post, which was captured by X users, included a thinking-face emoji.

Mr. Musk took down the post after it immediately drew outrage. X says he has more than 197 million followers on the platform, which he bought in 2022.

“Well, one lesson I’ve learned is that just because I say something to a group and they laugh doesn’t mean it’s going to be all that hilarious as a post on X,” he said in a follow-up post early Monday. “Turns out that jokes are WAY less funny if people don’t know the context and the delivery is plain text,” he wrote in another.

The Secret Service said on Sunday that it had fired on an armed man at Mr. Trump’s golf club in West Palm Beach, Fla., while the former president was playing. A suspect was later arrested. The incident followed one in July in which Mr. Trump was shot in the ear by a would-be assassin while he was holding a rally in Pennsylvania. The shooter was killed by law enforcement officers.

Mr. Musk, the world’s richest man, has established a reputation as an edgy plutocrat not bound by social conventions when it comes to expressing his opinions and broadcasting what is on his mind to his followers. His power and wealth have made