Robert S Mueller III
Robert Swan "Bob" Mueller III is a Republican who was appointed by President George W. Bush with his original ten-year term given a two-year extension by President Barack Obama, making him the longest-serving FBI director since J. Edgar Hoover.
Mueller is currently head of the Special Counsel investigation of Russian interference in the 2016 United States elections. He is a no-nonsense, strait-laced attorney and investigator, as well as the nickname "Bobby Three Sticks," in reference to his name's numeric suffix.