Defense Secretary Pete Hegseth demanded proof that Adm. Christopher Grady, the then-acting Chairman of the Joint Chiefs of Staff, hadn’t leaked news of a March 21 classified briefing for Elon Musk on ...

WASHINGTON – Defense Secretary Pete Hegseth divulged classified information in March from battlefield commanders about the U.S. attack on Houthi rebels in a chat on the commercial messaging app Signal ...

Sen. Adam Schiff has repeatedly shut down claims he leaked classified information, including in August when the Trump admin ...

Department of Homeland Security Secretary Kristi Noem ordered the acting director of FEMA to undergo a polygraph examination last month as part of an aggressive internal investigation into leaks ...

The Department of Homeland Security has administered lie detector tests to about 50 staffers in recent weeks, including FEMA’s acting administrator and roughly a dozen officials at the disaster relief ...

National security agencies across the Trump administration are ramping up investigations into alleged leaks to the news media, in some cases using polygraph tests that current and former officials say ...

A version of this story appeared in CNN’s What Matters newsletter. To get it in your inbox, sign up for free here. When President Ronald Reagan’s White House threatened thousands of government ...

Federal agencies have stepped up their efforts over the past few weeks to find potential leakers, and some — like the FBI, the Department of Homeland Security and the Department of Defense — are ...

The Federal Bureau of Investigation (FBI) has found itself embroiled in a rather odd situation involving polygraph tests. In April, it confirmed to NPR that it was using these tests to catch personnel ...