Elon Musk is leaving Washington. Trump has been talking about him in the past tense for more than a week now.
Since Trump's inauguration, Elon Musk has lost $100 billion dollars - $1 billion per day. That's in addition to the hundreds of millions of dollars Musk has contributed to Trump's campaign.
Tesla stock has lost half of its value worldwide, and sales of Tesla automobiles are down 70% in Europe, and more than 50% in the USA. Musk has called Peter Navarro a "moron" for the tariff policies, and advocated for free trade with Europe.
Musk joins a long line of those who think they can control Trump. Ask the Republican Party of 2016 how that turned out for them.