It’s a more extensive use of the app than previously reported and sheds new light on how commonly the Trump administration’s ...

Democratic leaders of key House committees are reigniting calling for national security adviser Mike Waltz to step down.

Her quotes capped off a remarkable, weeklong stretch that began after The Atlantic’s editor-in-chief, Jeffrey Goldberg, ...

There has been intense scrutiny on both men after a journalist was inadvertently included in a sensitive private group chat.

Amid the backlash to the Trump administration’s use of the private messaging app Signal for sensitive U.S. military planning ...

Jeffrey Goldberg, editor-in-chief of The Atlantic, decried assertions he had never spoken with national security adviser Mike Waltz before being included in a Signal group chat with top Trump ...

Waltz was the face of a crisis last week after inadvertently adding a journalist to a group chat discussing attacks on the ...

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

Earlier this week, the Wall Street Journal reported that Waltz had “created and hosted multiple other sensitive ...

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

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

The inquiry will examine whether the Pentagon chief violated the agency’s standards for sharing classified information.