It’s a more extensive use of the app than previously reported and sheds new light on how commonly the Trump administration’s ...

The team led by U.S. President Donald Trump's national security adviser, Mike Waltz, set up at least 20 group chats on the commercial Signal app to coordinate official work on issues involving China, ...

Democratic leaders of key House committees are reigniting calling for national security adviser Mike Waltz to step down.

And Trump also waived off the issue when asked by reporters Thursday about ... The Wall Street Journal reported this week ...

As fallout from a Trump administration group chat about a military attack in Yemen continues to unfold, some Democrats are ...

U.S. National Security Advisor Mike Waltz, who started the now-infamous group chat coordinating a U.S. attack against the ...

The Trump cabinet’s shocking leak of its plans to bomb Yemen raises myriad confidentiality and legal issues. The security of the encrypted messaging app Signal is not one of them.

Whether the Signal chat conduct constituted "gross negligence" under the Espionage Act is a separate question. National ...

The CIA Director and the Director of National Intelligence testified that they did not share classified information in a messaging group chat that discussed the U.S. bombing campaign in Yemen.

Sources say the national security adviser ... to discuss sensitive issues, Politico reported Wednesday. Waltz and his team have apparently been regularly setting up Signal chats to discuss topics ...

US president defends key security official after journalist says he was added to group chat about air strikes.