When Elon Musk puts on a nice suit, it has a way of looking like a demotion. Elon Musk, wearing a T-shirt and a ball cap, at the White House last month.Credit...Doug Mills/The New York Times ...

Outfitted in a black sweatshirt featuring an embroidered Ukrainian trident, black slacks and boots, he was substantially underdressed in comparison to Trump, who was wearing a suit and tie.