The Justice Department watchdog cast a wide net in condemning the FBI’s handling of a highly sensitive investigation into President Trump’s 2016 campaign.

Inspector General Michael Horowitz, in his first public remarks since releasing a report on his assessment of the Russia investigation, took aim at top officials in the bureau who oversaw a flawed effort to obtain the authority to electronically monitor Carter Page, an American foreign policy adviser who helped Trump’s election effort and was suspected of being a Russian asset.