Roger J. Stone Jr. set foot on the stage — sorry, the floor of the federal court in Washington — on Friday for his scheduling hearing in a somber pinstriped ocean-dark suit, matching dark tie, pristine white shirt and muted pocket handkerchief, bringing to a temporary close the latest installment of what may become one of the most-watched spinoffs of the reality show known as “The Trump Administration.”

It was a veritable replay of what Mr. Stone, the political operative and former Trump adviser, chose to wear for his earlier court appearance, on Tuesday (a single-breasted three-button navy suit, pure white shirt with a Windsor collar, white pocket handkerchief and marine blue knit tie).

That itself was a more formal version of the navy polo shirt with white polo pony and dark jeans Mr. Stone had worn last Friday, when he was arrested on seven counts of obstruction, witness tampering and making false statements. He appeared after the indictment with both arms raised in a Nixonian victory sign.

Why do such costumes matter?

Because Mr. Stone has long treated — and referred to — his wardrobe as exactly that: a key part of the theater of his life in politics.

This is, after all, a man who wore full morning dress to the 2017 inauguration; who is famous for his penchant for bespoke double-breasted suits from Savile Row or Alan Flusser (a tailor known for his master-of-the-universe clients); who once joked that he had more shoes than Imelda Marcos; and who called himself a “showman” in his 2018 book, “Stone’s Rules: How to Win at Politics, Business, and Style.” Someone who believes fully in the power of clothing as communications tool, and is comfortable admitting it. Crowing about it, even.