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

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

A dozen current and former officials confirmed that the encrypted messaging app is used across various agencies — despite ...

Just seven days after the Signal chat scandal erupted, the White House announced that it doesn’t want to talk about it ...

The team of President Donald Trump's national security adviser, Mike Waltz, set up at least 20 group chats on the commercial ...

National Security Advisor Michael Waltz and a senior aide used personal Gmail accounts for government communications, ...

Rep. Ro Khanna joins The Lead ...

Representative Jimmy Gomez (D-CA) joins José Díaz-Balart on MSNBC to talk about cybersecurity concerns following the Signal ...

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

Last week, the White House said the National Security Council, the White House counsel office and President Trump adviser ...

The team led by U.S. President Donald Trump's national security adviser, Mike Waltz, set up at least 20 group chats on the ...

President Donald Trump’s nominee to become the next chairman of the Joint Chiefs of Staff acknowledges he's an unconventional ...