A photo taken this week showed Mike Waltz using an app that looks like—but is not—Signal to communicate with top officials. "I don't even know where to start with this," says one expert.

More than a month after he drew criticism for using Signal to discuss an impending military attack, Waltz was seen using what ...

The Trump administration ousted national security advisor Mike Waltz and other staffers with the National Security Council, Fox News Digital confirmed.

The communications app TeleMessage, which was spotted on former US national security adviser Mike Waltz's phone, has suspended “all services” as it investigates reports of at least one breach.

Days after former National Security Adviser Mike Waltz was caught using a knock-off Signal app, a hacker broke into the ...

There are some hurdles former National Security Advisor Mike Waltz must clear first before the United Nations ambassador job is his — including undergoing a Senate confirmation process.

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

Waltz did not require congressional approval to serve earlier as President Donald Trump’s national security adviser ...

President Donald Trump has removed Mike Waltz as national security adviser and instead will nominate him for United Nations ambassador.

In response to the photos of Waltz, White House communications director Steven Cheung said in an X post: "Signal is an approved app that is loaded onto our government phones. Thank you for your ...

Trump publicly stood by Waltz after his national security adviser and other members of the chat vigorously denied they'd shared classified war plans on the publicly available app Signal.

The unofficial version of Signal used by Donald Trump's former National Security Adviser Mike Waltz has been hacked, tech site 404 Media said Sunday, raising further concern over the security of the ...