For all the insults that Mr. Musk and Mr. Trump traded on Thursday, don’t be surprised if they make up again days from now. In the meantime, they both benefit.

The Whole Mars Catalog replied: “ nothing wrong with being a little horsey every once in a while .” Ketamine is often used as a veterinary anesthetic, especially for horses. Aside from ketamine, the report from the New York Times claimed Musk has been using Ecstasy, psychedelic mushrooms, and the prescription medication Adderall.

As Mr. Musk entered President Trump’s orbit, his private life grew increasingly tumultuous and his drug use was more intense than previously known.

The president could tighten federal oversight of the tech titan’s businesses, even if heavy reliance by the Pentagon and NASA on them makes terminating Mr. Musk’s contracts less feasible.