Director, Is Named Special Counsel for Russia Investigation - By REBECCA R. RUIZ and MARK LANDLERMAY 17, 2017 WASHINGTON — The Justice Department appointed Robert S. Mueller III, a former F. B.I. While Mr. Mueller remains answerable to Mr. Rosenstein — and by extension, the president — he will have greater autonomy to run an investigation than other federal prosecutors. Mr. Mueller backed up Mr. Comey, then the deputy attorney general, in March 2004 after he threatened to resign when the White House overruled the Justice Department finding that domestic wiretapping without a court order was unconstitutional. The decision by the deputy attorney general, Rod J. Rosenstein, came after a cascade of damaging developments for Mr. Trump in recent days, including his abrupt dismissal of the F. B.I. director, as special counsel on Wednesday to oversee the investigation into ties between President Trump’s campaign and Russian officials, dramatically raising the legal and political stakes in an affair that has threatened to engulf Mr. Trump’s four-month-old presidency. director, James B. Comey, and the subsequent disclosure that Mr. Trump asked Mr. Comey to drop the investigation of his former national security adviser, Michael T. Flynn. By appointing Mr. Mueller, a former federal prosecutor with an unblemished reputation, Mr. Rosenstein could alleviate uncertainty about the government’s ability to investigate the questions surrounding the Trump campaign and the Russians.