Letters include that Trump's failure to command means he should resign from office; and how Congress and Trump keep lying ...

Pete Hegseth has had a rough few weeks, what with his starring role in the Signal chat scandal and calls for his resignation ...

Britain and Mauritius are finalising a deal to transfer sovereignty over the Chagos Islands, a disputed UK territory that is ...

President Trump seems to be aware of this standard language ... an unsecured and not approved “Signal” communications method to discuss secret classified military operations.

Signal’s president, Meredith Whittaker, recently stepped up to defend the app’s security after an embarrassing slip-up by top ...

The recent security breach by top U.S. national security advisers using the Signal messaging app has put a new “gate” in our ...

The encrypted chat app beloved by Elon Musk and foreign dissidents has been embraced by federal government workers, DOGE and military planners.

Nahal Toosi is POLITICO’s senior foreign affairs correspondent. She has reported on war, genocide and political chaos in a ...

Dave Abrutat, official historian at GCHQ, is on a mission to preserve the UK’s historic signals intelligence (Sigint) sites ...

President Trump said his national security adviser, Mike Waltz, "learned a lesson" after he opened up a secret chat of Trump ...

Signal prides itself on being as secure as possible - but it's still a messaging app, and Pentagon rules state classified information should not be shared on these platforms.

Jamie Dimon, famous financier and chief executive at JPMorgan Chase (NYSE:JPM), might have taken a moment today to celebrate ...