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.

U.S. Rep. Jim Himes unleashed a barrage of criticisms at the Trump administration and the state of the U.S. Congress on ...

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 ...