The American Civil Liberties Union (ACLU) told federal lawmakers on Friday that Elon Musk and his Department of Government Efficiency (DOGE) have seized control over a number of federal computer systems that house data tightly restricted under federal statutes. In some cases, any deviations in the manner in which the data is being used may be not only illegal, the ACLU says, but unconstitutional. DOGE operatives have infiltrated or assumed control over a number of federal agencies that are responsible for managing personnel files on nearly two million federal employees, as well as offices that supply the government with a broad range of software and information technology services. Unauthorized use of sensitive or personally identifiable data as part of an effort to purge the government of ideologically unaligned staff may constitute a violation of federal law. The Privacy Act and the Federal Information Security Modernization Act strictly prohibit, for instance, unauthorized access and use of government personnel data.