Mike Waltz, the national security adviser for President Donald Trump, is seen in photos using Signal during a Cabinet meeting ...

A hacker breached TeleMessage, a government-approved messaging app used by Trump administration officials, exposing archived ...

President Trump recently discouraged the use of the Signal app after controversy over a group chat of administration ...

Secretary of Defense Pete Hegseth has faced multiple allegations of sharing classified information on Signal, a commercially ...

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

Today, the Trump administration announced that national security advisor Mike Waltz would be leaving the White House after ...

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

Mike Waltz, President Trump's national security advisor, is leaving the White House weeks after he accidentally added a ...

Jill Biden is suspected of giving a secret signal to her husband, former President Joe Biden, when she didn’t want him to ...

The images, captured by Reuters, show Mike Waltz, the former national security adviser, using the TM SGNL app, which allows ...

WASHINGTON — The White House expressed support Monday for Defense Secretary Pete Hegseth following media reports that he ...