The Justice Department's inspector general, Michael Horowitz, testified before the Senate Judiciary Committee on Wednesday about his report on the origins of the FBI's probe into the 2016 Trump campaign's possible ties with Russia.
The 400-plus page report, released Monday, found that the FBI had ample evidence to open its investigation — despite allegations of political bias.
But, Horowitz told the panel, "Our review identified significant concerns with how certain aspects of the investigation were conducted and supervised."
He said the FBI failed to adhere "to its own standards of accuracy and completeness" when it filed applications under the Foreign Intelligence Surveillance Act regarding former Trump campaign aide Carter Page.