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Mystery Filing Appears to Ask High Court to Act in Mueller Probe

  • Grand jury dispute has been long been shrouded in mystery
  • Special counsel is investigating Russian election meddling
Special Counsel Robert  Mueller

Special Counsel Robert  Mueller

Photographer: Brendan Smialowski/Getty Images 

A new legal filing appears to ask the U.S. Supreme Court to intervene for the first time in Special Counsel Robert Mueller’s investigation into the 2016 election.

The document, which is under seal, stems from a Dec. 18 federal appeals court ruling that required an unidentified company, owned by an unidentified foreign country, to turn over information to a grand jury.