Judge Walton's decision means that the defense lawyers will probably ask a federal appeals court to block the sentence, a long-shot move. It also sharpens interest in a question being asked by Mr. Libby's supporters and critics alike: Will President Bush pardon Mr. Libby? ... So far, the president has expressed sympathy for Mr. Libby and his family but has not tipped his hand on the pardon issue. ... If the president does not pardon him, and if an appeals court refuses to second-guess Judge Walton's decision, Mr. Libby will probably be ordered to report to prison in six to eight weeks' time. Federal prison authorities will decide where. "Unless the Court of Appeals overturns my ruling, he will have to report," Judge Walton said.