Via Kyle Griffin:

The Secret Service is looking into Elon #Musk's Twitter post (later removed) that suggested it was strange no one attempted to assassinate President #Biden or Vice President #Harris.

In response to a FOIA request, the agency said it's withholding records due to "enforcement proceedings." https://www.bloomberg.com/news/newsletters/2024-09-19/musk-x-post-about-biden-harris-threats-leads-to-secret-service-investigation