Moments after being convicted of contempt of Congress in July, Steve Bannon, a former media entrepreneur, naval officer, investment banker and Trump administration aide, walked out of a Washington courthouse and made a declaration that summed up what the better part of the last decade of his life had been about. “I stand with Trump and the constitution, and I will never back off that, ever,” Bannon declared. On Friday, a federal judge sentenced Bannon to four months in jail and a $6,500 fine, for defying a subpoena from lawmakers investigating the January 6 insurrection. It was the latest twist...