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

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

When Donald Trump selected Mike Waltz to serve as national security adviser, the choice was widely seen as win-win: A combat veteran with four Bronze Stars would bring his judgment to the White House and his deep-red Florida House district was safe in Republican hands.

The Atlantic's editor-in-chief Jeffrey Goldberg reported he was accidentally added by Mike Waltz to a group chat containing secret military plans.

Just seven days after the Signal chat scandal erupted, the White House announced that it doesn’t want to talk about it anymore. In fact, it was Monday when press secretary Karoline Leavitt said that, as far as she and her colleagues are concerned, “this case has been closed.”

Despite calls for Mike Waltz or Pete Hegseth to resign, so far White House officials are bashing only The Atlantic. Here’s the latest on the debacle.

As the president has made it very clear, Mike Waltz continues to be an important part of his national security team. And this case has been closed here at the White House, as far as we are

In public, President Trump has defended his national security adviser. But behind the scenes, he has cast around for advice.

Mike Waltz said he's "never met, don't know, never communicated" with Jeffrey Goldberg, the editor-in-chief of The Atlantic.