Mike Waltz was removed as Trump's national security adviser and faces Senate confirmation as the new nominee to be ambassador to the U.N.

Secretary of State Marco Rubio's new job as national security adviser sets the former Donald Trump rival up for a bigger role in war and peace.

A group of President Donald Trump’s cabinet members who inadvertently included the editor of the Atlantic in their Signal ...

Revelations about the defense secretary’s passwords came after he discussed details of planned U.S. airstrikes on a messaging ...

The messaging app used by some members of the Trump administration and the US government has been hacked, according to a new ...