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.

Elon Musk swapped his usual black 'Dark MAGA' hat for a red 'Trump was right about everything' hat at Monday's Cabinet meeting

President Donald Trump defended Elon Musk, who attended a second Cabinet meeting Monday at the White House, as cost-cutting measures throughout the government were discussed and often praised.