Special Counsel Robert Mueller spent more than $732,000 on outside contractors, including private investigators and researchers, records show, but his office refuses to say who they were. While it’s not unusual for special government offices to outsource for services such as computer support, Mueller also hired contractors to compile “investigative reports” and other “information." The arrangement has led congressional investigators, government watchdog groups and others to speculate that the private investigators and researchers who worked for the special counsel’s office might have included Christopher Steele and Fusion GPS, the private research firm that hired Steele to produce the Russia collusion...