Trump’s National Security Adviser was using Gmail for sensitive discussions—which is far less secure than Signal.

He has never sent classified material over his personal email account or any unsecured platform,” the spokesperson insisted.

National Security Adviser Mike Waltz reportedly had his team set at least 20 Signal chats for other crises across the globe, sources told Politico.

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

Mary McCord, Former Acting Assistant Attorney General for National Security at the Justice Department join Nicolle Wallace on Deadline White House with reaction to new stunning reporting by the Washington Post,

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

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

Wired reported that the national security adviser's list of friends on Venmo was public until Wednesday afternoon.

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