A U.S. appeals court on Tuesday rejected a challenge brought by an associate of Roger Stone, the indicted long-time adviser to President Donald Trump, to the legality of Robert Mueller¡¯s 2017 appointment by the Justice Department as special counsel heading the Russia investigation.

In doing so, the U.S. Court of Appeals for the District of Columbia Circuit upheld a lower court¡¯s decision to hold Andrew Miller in contempt for refusing to comply with a grand jury subpoena served on him by Mueller, who is investigating potential conspiracy between Trump¡¯s 2016 campaign and Moscow.

Miller¡¯s case marked the third legal challenge to Mueller¡¯s authority that has failed so far, including efforts by Paul Manafort, Trump¡¯s former campaign chairman who has been convicted on a series of charges and pleaded guilty to others, and a Russian company accused of meddling in the election.