The U.S. District Court for the District of Columbia on Thursday posted an unsealed court ruling that rejected a challenge to a grand jury subpoena issued by the special counsel, Robert Mueller III.

U.S. District Judge Beryl Howell wrote: “The witness raises legitimate questions, but his concerns are not legally sustainable. The scope of the Special Counsel’s power falls well within the boundaries the Constitution permits, as the Special Counsel is supervised by an official who is himself accountable to the elected president.”