Dan Caldwell, a top adviser to Secretary of Defense Pete Hegseth, was put on leave this week amid an investigation into leaks ...

Intelligence officials within President Donald Trump’s administration said Tuesday there was no classified information in the Signal discussion between administration ...

The leak that astonished Washington, D.C., landed Monday. Even for a Trump administration, this level of ineptitude is ...

The top Republican and Democrat on the Senate Armed Services Committee requested an investigation Thursday into how Trump national security officials used the Signal app to discuss military strikes, ...

A Pentagon-wide advisory that went out one week ago warned against using Signal, the messaging app, even for unclassified ...

Classified information falls into three basic categories ... What the Leak Revealed: Our reporters discuss what the Signal chat leak revealed about the Trump administration and the state ...

The White House on Monday said it was “moving forward” from the fallout surrounding the leak of sensitive military plans to a ...

The top Republican and Democrat on the Senate Armed Services Committee are asking the Defense Department's inspector general to probe the Signal chat.

A letter from the inspector general for the Department of Defense says “the objective of this evaluation it to determine the ...

It is unclear what specific information Caldwell, a top adviser in the Office of the Secretary of Defense, allegedly leaked ...

Across Washington, the Signal leak presented a major test early ... handled investigations into the mishandling of classified or sensitive information by both Republican and Democratic ...

On Monday it was revealed that top Trump administration officials were using a commercial messaging app to plan military attacks. What is Signal?