US judge issues gag order in case of Trump advisor Roger Stone

A US judge issued a gag order on Friday in the case against Roger Stone, the Trump advisor who has pleaded not guilty to charges stemming from the investigation into whether the president's election campaign colluded with Russia.Stone, 66, is charged with lying to Congress, witness tampering and obstruction stemming from his contacts with WikiLeaks, whose publication of Russian-hacked communications from Democrat Hillary Clinton's campaign gave a boost to Donald Trump.Stone was told not to speak