U.S. court rejects Stone aide's challenge to special counsel Mueller

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 o