WASHINGTON — A federal judge on Friday placed some limits on what longtime Donald Trump confidant Roger Stone and his lawyers can say publicly about his criminal case brought by the special counsel in the Russia probe. But U.S. District Judge Amy Berman Jackson stopped short of imposing a broad ban on public comments by the outspoken political operative, issuing a limited gag order she said was necessary to ensure Stone’s right to a fair trial and “to maintain the dignity and seriousness of the courthouse and these proceedings.” The order bars Stone from making comments about his pending case near the courthouse but it does not constrain him from making other public statements about his case.