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

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

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

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

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

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

Trump’s former national security adviser lets loose on the leaked Signal group chat and Trump’s foreign policy.

President Donald Trump’s second-term honeymoon appears to be coming to an end as he faces a worldwide rebuke to his tariffs ...

Gen. Timothy Haugh’s firing as head of the NSA and U.S. Cyber Command has left lawmakers worried about the future of the nation’s cyber defenses.

The Oklahoma Republican is one of few members of his party publicly calling for further investigation into the national ...

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

Senate Intelligence ranking member Mark Warner (D-Va.) on Sunday slammed the White House officials involved in the Signal breach scandal, saying they risked American lives and calling into ...