The team led by U.S. President Donald Trump's national security adviser, Mike Waltz, set up at least 20 group chats on the ...

A dozen current and former officials confirmed that the encrypted messaging app is used across various agencies — despite ...

President Trump suggested Wednesday that the encrypted Signal messaging platform his top national security brass used to plan ...

Democratic leaders of key House committees are reigniting calling for National Security Advisor Mike Waltz to step down.

National security adviser Mike Waltz’s team regularly set up chats on Signal to coordinate official work on issues including Ukraine, China, Gaza, Middle East policy, Africa and Europe, according to ...

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

The national security adviser's use of the messaging app is under scrutiny after he mistakenly added a journalist to a ...

The team of President Donald Trump's national security adviser, Mike Waltz, set up at least 20 group chats on the commercial ...

Four sources tell Politico they were aware of at least 20 chat groups, all four confirmed sensitive information was discussed ...

The White House has declared the controversy around a Signal chat for a military strike that inadvertently included a ...

Secure messaging app Signal has been in the spotlight this week for national-security reasons, but companies can also learn lessons from the Trump administration’s misstep.

The Trump administration is still monitoring the fallout from the disclosure of attack plans, as a watchdog inquiry looms.