Jeffrey Goldberg, editor-in-chief of The Atlantic magazine, said in a bombshell report Monday ... Trump advisor Waltz takes 'full responsibility' for Signal chat leak Waltz said Tuesday that ...

Defense officials say Dan Caldwell, a senior adviser to Defense Secretary Pete Hegseth, has been placed on administrative ...

A watchdog group has said the exchanges on the Signal app were federal records, and sued in an effort to preserve them.

The diplomat expressed hope that the Signal lapse was due to a lack of experience in government rather than a deliberate disregard for security. Asked if he had concerns about sharing intelligence ...