David is then joined by former Ambassador Susan Rice for a sweeping conversation on the disintegration of national-security ...

Shouldn't the lesson from SignalGate include the realization that maybe these apps aren't the best way to conduct the ...

We recently learned that Secretary of Defense Pete Hegseth  shared details  of impending drone strikes on Yemen in a group ...

The Trump White House is consolidating its national security team in a way that will minimize independent voices, political ...

Mike Waltz has been ousted as national security advisor and now faces a confirmation fight for U.N. ambassador role.

An information exposure flaw in TeleMessage has been added to CISA’s Known Exploited Vulnerabilities catalog. The ...

Signalgate was the national security adviser’s most glaring mistake. But his problems ran deeper. After Michael Waltz, the ...

RONALD J. DEIBERT is Professor of Political Science and Director of the Citizen Lab at the University of Toronto Munk School of Global Affairs and Public Policy. He is the author of Chasing Shadows: ...

Rep. Sarah Elfreth is seeking answers from Defense Secretary Pete Hegseth as military libraries face a deadline to remove ...

A photo taken this week showed Mike Waltz using an app that looks like—but is not—Signal to communicate with top officials.

The president says Waltz, who started the leaked Signal chat, will be nominated as US ambassador to the UN and be temporarily replaced by Secretary of State Marco Rubio.

President Donald Trump said Thursday that he would nominate outgoing national security adviser Mike Waltz to be the U.S. ambassador to the United Nations. Waltz, a former congressman from Florida ...