Sources tell The Wall Street Journal that the Defense secretary took part in at least a dozen chats in the app, many of which were started by Hegseth himself. According to the Journal, Hegseth used the chats to discuss his schedule, foreign travel, and media appearances.
Waltz's nomination to UN Ambassador comes after a notable Signal controversy during his tenure as national security advisor, highlighting ongoing communication challenges in the administration.
Hegseth pushed back on claims that he shared military plans via private channels, asserting they were informal and unclassified, despite strong contrary opinions from military experts.