WASHINGTON – National Security Adviser Mike Waltz told Fox News on Tuesday he took “full responsibility for inviting a ...

The Trump administration's IT team members investigated how Atlantic editor-in-chief Jeff Goldberg was added to a Signal ...

President Donald Trump confirmed that multiple employees within the National Security Council were fired Thursday, adding to ...

Why was the national security adviser doing the tedious administrative work of setting up a chat group that should have been ...

President Trump on Thursday confirmed a reported purge of national security agencies this week, with firings of at least a ...

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

After 'Signalgate,' the encrypted communication app is rocketing up the app charts—even as the Trump administration attempts ...

Officials will have to find ways to overcome the need for special buildings and rooms.

Former members of the defense and intelligence communities wonder who’s in charge of policy and operations — and if they’re ...

The Trump administration has fired Timothy Haugh, the head of the National Security Agency (NSA) and Cyber Command, several news publications reported overnight into Friday.

Trump and his administration have repeatedly defended the national security leader amid criticisms over the chat leak. Signal is an encrypted messaging app that operates similarly to texting or ...

The White House’s assertion that the case is closed surrounding national security officials’ use of Signal is getting pushback in Congress, even among some Republicans who say their own probes ...