Mr. Musk is fundamentally a creature of Silicon Valley, a scene that initiated an entire revolution in power dressing. The young masters of that universe dressed down to show that they were members of a new elite — one that refused to dress like the grown-ups they were about to topple. It was the defeat of the suit by the T-shirt.

President Trump picked a shiny red sedan to show his support for Musk‘s electric vehicle company as it faces blowback because of his work to advance the president’s political agenda and downsize the federal government.