At the time of the rise of the Tea Party, in the spring of 2010, "Bannon went through 'a visible transformation,' a friend said."

"'In his days in business, he dressed like an investment banker from Connecticut—shirt and jacket, tie or not, boring men’s shoes, a short, conventional men’s haircut. But he couldn’t show up at the Tea Party dressed like that. He started dressing more casually. There was this other side of him—he was from the South, he could be in a sports bar in West Virginia, and he would be accepted... He never fit in in the world of investment banking—he was this gauche Irish kid. Never fit in in the Hollywood world—his politics were much too conservative. Never fit in in the mainstream Republican world—he wasn’t uptight like them. But then he got embraced by the Tea Party world. He really started playing that role, and he came into his own. He loved being on TV.'"

From "HOW HOLLYWOOD REMEMBERS STEVE BANNON/He says that, before he became a senior adviser to the President, he was a successful player in the film industry. But what did he actually do?" by Connie Bruck (in The New Yorker).

Also about clothing:

In 2011, Bannon released a documentary about Sarah Palin, “The Undefeated.”... The real star of the movie was Andrew Breitbart... Over footage of a young man wearing a fitted suit in a corporate office, Breitbart says, "When you go to Washington, D.C., and you meet with the conservative movement, it’s as if they’ve read the exact right books, taken the right tests, met the right people, are wearing the right outfits, wearing the right tie—and you almost feel like an outsider, even though you’re in the actual conservative movement."

To pick up that topic of books, let me just pull out 2 things:

1. "By the early aughts, the former Hollywood colleague recalled, '[Bannon] was sitting on Canon Drive, in his fabulous office, his bookshelves lined with military and history books, and he would take meetings all day with people, some of whom came to him for money for their movies."

2. "When the girls were ready to start kindergarten, Bannon and his ex-wife visited a number of schools. During an interview at one of them, she wrote in a court filing, Bannon 'asked the director why there were so many Chanukah books in the library.'"