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

The recent national security breach involving a Signal group chat has raised concerns regarding the messaging app’s security.

WASHINGTON >> The team led by President Donald Trump’s national security adviser, Mike Waltz, set up at least 20 group chats ...

Learn more about Signal, including whether the news about its use in a military intelligence breach impacts its effectiveness ...

The president of Signal defended the security of the encrypted messaging app on Tuesday after a bombshell report revealed top ...

Four sources tell Politico they were aware of at least 20 chat groups, all four confirmed sensitive information was discussed ...

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

Beyond concerns about security, Signal and other similar apps may allow users to skirt open records laws. Without special ...

A magazine journalist’s account of being added to a group chat of U.S. national security officials coordinating plans for ...

US president defends key security official after journalist says he was added to group chat about air strikes.

The Pentagon has issued a stark warning against the use of the encrypted messaging app Signal, raising concerns over cybersecurity lapses at the highest levels of government. This advisory comes in ...

White House staffers have come under fire after allegedly using the app to discuss sensitive foreign policy plans.