Former National Security Advisor Mike Waltz faced scrutiny over a Signal chat incident during his U.N. ambassador hearing ...

Signal chat flouted rules on classified intel, say former defense officials. Rep. Raja Krishnamoorthi (D-Illinois) points to military attack plans that Defense Secretary Pete Hegseth shared on an ...

If you hadn’t heard of Signal before Monday, chances are you have now. The secure messaging app, available for iPhones and Android devices, has long been popular with journalists because of its ...

Welcome to The Hill’s Defense & NatSec newsletter{beacon} Defense &National Security Defense &National Security   The Big Story Another Signal-gate headache for ...