Federal prosecutors urged the U.S. Court of Appeals on Monday to deny an emergency motion to keep an outspoken ally of former President Donald Trump from going to prison next month. Former White House chief strategist Steve Bannon “cannot meet the legal standard” to further delay his four-month sentence for contempt of Congress after the appeals court in Washington, D.C., unanimously upheld his conviction, prosecutors said in a 25-page court filing. Bannon’s “speculation” that the Supreme Court might take up his case “says nothing about the likelihood” it would happen, and that possibility “is…