On June 14, 2018, Inspector General Michael Horowitz issued his report criticizing Comey's handling of the Clinton email probe as "insubordinate". Specifically, he stated that Comey made "a serious error in judgment", "usurped the authority of the Attorney General," "chose to deviate" from established procedures, and engaged "in his own subjective, ad hoc decision making" by publicly announcing that he wouldn't recommend any charges in the Clinton email investigation in July 2016 and later by sending a letter to Congress about reopening the case. The report found no evidence of political bias, although other high-ranking FBI officials showed "willingness to take official action" to negatively impact the Trump campaign.