Inside the Signal Blunder That Triggered a National Security Storm. In what is now being dubbed the “Signal Slip,” President Donald Trump has admitted that a national security staffer in Mike Waltz’s office was responsible for inadvertently adding Atlantic editor Jeffrey Goldberg to a high-level encrypted Signal group chat. The thread, known internally as “Houthi … Continue reading Signal Fallout: Trump Defends Waltz, But Fallout Spreads Beyond One Chat Thread