You have to hand it to Elon Musk. The man who plumbed the depths of his PayPal fortune to launch SpaceX, a private rocket company, and put up with “production hell” to make Tesla’s first mass-market electric vehicles (EVs), has just pulled off another coup. President-elect Donald Trump’s most prominent financial backer and loudest advocate has come as close to the levers of presidential power as any serving CEO in American history.