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 ...

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

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

Goldberg has also said the chats included the name of an “undercover” CIA officer, which he withheld. Another federal law, ...

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

Regardless of app security, experts say communicating the military plans of the U.S. government in a non-classified space ...

A number of the Signal group chat members have stayed relatively quiet about the incident. Those include Wong, Needham, Katz, ...

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

Nahal Toosi is POLITICO’s senior foreign affairs correspondent. She has reported on war, genocide and political chaos in a career that has taken her around the world. Her reported column, Compass, ...

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