The Federal Bureau of Investigation is preparing to seek criminal charges against former U.S. National Security Advisor John Bolton for allegedly transmitting highly classified information through a private email server, according to a report by Fox News on 24 August. Details of the investigation have not been disclosed, and neither the FBI nor Bolton’s representatives immediately responded to requests for comment. Bolton, who served in the White House from 2018 to 2019, has been a prominent foreign-policy commentator since leaving government. If filed, the case would mark one of the rare instances in which a senior national-security official faces prosecution over the handling of sensitive material, underscoring the Justice Department’s broader focus on safeguarding classified information.