Elon Musk is the most prominent user on his own social media site, X. He posts frequently almost every day on the site, which was formerly called Twitter. On March 18, so far Musk has posted or reposted 19 times, with the majority of his posts being about the Space Dragon docking at the International Space Station.

Like his wealth, Musk’s mystique as a genius businessman rests largely on the success of Tesla. And now that success is now anything but assured,” says Chris Hayes.