text: Andrew Miller, a longtime aide to right-wing "dirty trickster" Roger Stone, has been held in contempt of court for refusing to testify before special counsel Robert Mueller's grand jury. Miller argues that Mueller's appointment is unconstitutional.
  Mueller is continuing to investigate Russian meddling in the 2016 election and any ties to Trump associates, and he and the president's lawyers are negotiating the terms of a possible interview with Mr. Trump.
  In a related development, another Stone associate, comedian and talk show host Randy Credico confirmed that he had been subpoenaed by the special counsel's office, which is probing alleged Russian interference in the 2016 USA presidential election. CNN first reported the subpoena.
  Both Miller and Davis have been called to testify in Mueller's investigation in what may be a sign the special counsel is building a case against Stone. She made the contempt ruling Friday after a closed hearing in Washington.
  Mueller has been focusing in recent months on Stone, who has had a decades-long relationship with Trump.
  Miller is a longtime associate of Stone and worked on Kristin Davis' campaign when the so-called "Manhattan Madam" unsuccessfully ran for governor of NY in 2010. Earlier this month, U.S. District Judge Beryl Howell in Washington ordered Miller to testify.
  The U.S. Senate intelligence panel, which is among several congressional committees conducting Russian Federation probes, is also investigating Wikileaks' role.