Former Federal Prosecutor Elliot Williams talks with Pamela Brown about whether it’s appropriate for Trump administration ...

The version of Signal that recently ousted National Security Adviser MIke Waltz was caught checking during a Cabinet meeting ...

President Donald Trump said there is one lesson his administration has learnt from Signalgate. "I think we learned: Maybe don ...

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

President Donald Trump has named Mike Waltz as his next nominee for the U.S. ambassador to the UN after ousting him as his ...

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

President Donald Trump had a testy exchange with ABC News' Terry Moran about Secretary of Defense Pete Hegseth during an ...

President Donald Trump's former national security adviser Mike Waltz was photographed using Signal during a Cabinet ... Rubio takes role for now White House Communications Director Steven Cheung ...

Photos captured by a Reuters photographer show Mike Waltz holding his phone beneath the table with the Signal app open.

House Republicans moved on Tuesday to block Democrats from forcing votes on the Trump administration’s use of Signal, ...

WASHINGTON − Mike Waltz is out as President Donald Trump's national security adviser and is instead his new nominee for ambassador to the United Nations in a major shake-up of Trump's national ...