Musk has always been an opportunist. All of his companies are things he's jumped on because they offered him a chance at a huge payout. He was acquired by PayPal, and he forced his way into Tesla. Likewise with Twitter, he was willing to burn huge piles of cash for what it offered him. He's a master of picking up a new project and amplifying it through the hype cycle.

The Tesla hype cycle is either nearing its end or peaked and I'm sure he knows this. The valuation for this company is ridiculous by any standard. So he's on to his next thing. By joining ranks with MAGA and he's purchased himself a driver seat for the most powerful country and strongest economy.

Obviously he still cares about Tesla, but it's not his primary focus anymore. He's moved on to his next big thing which I'm sure he expects to be many times more lucrative than Tesla was.