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

Goldberg reported that he was added to the Signal chat after he received a request from a user identified as Waltz. “Michael Waltz has learned a lesson, and he’s a good man,” Trump said.

Mike Waltz, after The Atlantic’s editor-in-chief was accidentally added to a private, high-level chat on the messaging app Signal in which military plans were being discussed. "Michael Waltz ...