The ability to navigate power dynamics in the White House and sort through competing policy visions is essential.

The clone, TeleMessage, was the subject of a reported hack in which the contents of some direct messages and group chats were ...

When the world discovered that Trump administration officials were discussing highly classified information over Signal, it ...

The TM SGNL app, a modified version of Signal used by Trump officials, has been hacked, potentially due to hardcoded ...

President Donald Trump’s removal of national security adviser Mike Waltz brings further disruption to a national security ...

RONALD J. DEIBERT is Professor of Political Science and Director of the Citizen Lab at the University of Toronto Munk School ...

Donald Trump’s National Security Adviser Mike Waltz will be leaving his role in the White House, multiple outlets have ...

By Eric Schmitt and Greg Jaffe Defense Secretary Pete Hegseth had the consumer messaging app Signal set up on a computer in his office at the Pentagon so that he could send and receive instant ...

He did so in one Signal group that was set up by the White House national security adviser ... with an assignment to improve military justice issues. Former top aides to Defense Secretary Pete ...

Republican issue, but as an American one. The second chat on Signal — which is a commercially available app not authorized to be used to communicate sensitive or classified national defense ...