Waltz and at least one senior aide used the commercial email service to discuss sensitive government matters, The Washington ...

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

Senior members of the Trump administration’s National Security Council — including its top national security adviser, Michael ...

National Security Advisor Mike Waltz accidentally added a journalist to a Signal group chat about classified military action ...

President Donald Trump said he is confident in his national security adviser, Mike Waltz -- a day after a report detailed how ...

President Trump stood by national security adviser Mike Waltz on Tuesday, one day after he was revealed to have looped in the ...

National security advisor Michael Waltz commented on the Signal text chain leak during an appearance on "The Ingraham Angle." ...

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

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

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

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

While defending his national security adviser, the president did something unusual: Trump implicitly acknowledged that Mike ...