Instead of the usual button-down dress shirt, Musk wore a single-breasted charcoal peacoat, which he opened wide at one point to show off the words “tech support” in large letters on a black T-shirt.

Republicans have criticized Zelensky for not wearing a suit during his White House visit, while Musk frequently dresses casually.

Karoline Leavitt has quickly developed a signature White House style. It includes lots of blazers, a pair of designer shoes, ...