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

The Journal obtained the following leaked Signal messages between Ismail Barhoum, former Hamas official in Gaza, and two ...

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

We’ve spent more time debating the security breach than we have scrutinizing whether an extensive U.S. strike campaign in ...

President Donald Trump ‘s national security adviser who appeared to inadvertently add a journalist to a group chat discussing ...

The White House denies that classified information was shared when The Atlantic editor Jeffrey Goldberg was added to a group ...