The affirmation of the investigation’s legitimacy, balanced by criticism of the way it was conducted, ensured that partisan battles would persist over one of the most politically sensitive investigations in FBI history. Monday’s review by department Inspector General Michael Horowitz knocked down multiple lines of attack against the Russia investigation, finding that it was properly opened and that law enforcement leaders were not motivated by political bias. It also rejected allegations that a former campaign aide at the center of the probe was set up by the FBI. It found that the FBI had an “authorized purpose” when it opened its investigation in July 2016 into whether the Trump campaign was coordinating with Russia to tip the election in his favor. Barr and Durham issued statements rejecting the inspector general’s conclusion that there was sufficient evidence to open the FBI investigation.