Federal prosecutors on Tuesday requested the judge overseeing ex-Donald Trump adviser Steve Bannon's criminal contempt of Congress case to order that he begin his four-month prison sentence, after an appeals court last week upheld his conviction. ... The three-judge panel of the D.C. Circuit Court of Appeals said in its opinion Friday, "We conclude that none of the information sought in the trial subpoenas was relevant to the elements of the contempt offense, nor to any affirmative defense Bannon was entitled to present at trial."