Former national security adviser Michael Waltz in the Cabinet Room of the White House in March. Shawn Thew / EPA / Bloomberg ...

The fired national security adviser engaged in intense coordination with Israeli Prime Minister Benjamin Netanyahu about ...

The national security advisor and his deputy are reportedly leaving their posts, after the former accidentally invited a ...

Waltz’s ouster on Thursday was cushioned by his appointment as President Donald Trump’s ambassador to the United Nations.

Mike Waltz, President Trump's national security advisor, is leaving the White House weeks after he accidentally added a ...

Waltz did not require congressional approval to serve earlier as President Donald Trump’s national security adviser ...

A Reuters photographer captured an image of Michael Waltz’s phone screen during a White House cabinet meeting, a day before ...

The app Waltz was using appeared to be “TM SGNL,” a modified version of Signal that retains and archives messages to comply ...

The ousted national security adviser will be nominated for U.N. ambassador, a less influential post, after his ...

Waltz inadvertently added The Atlantic's editor-in-chief to a group thread discussing sensitive national security matters.

The national security adviser infamously added The Atlantic's Jeffrey Goldberg to a Signal group chat discussing Yemen attack plans.