Democratic Sen. Tammy Duckworth of Illinois, who is on the Senate Armed Forces Committee, tells "Face the Nation with Margaret Brennan" that Mike Waltz, who resigned as national security adviser last week but has been tapped by President Trump to be U.

Waltz was at the center of the Signal chat controversy, in which a journalist was accidentally included in a discussion of sensitive military information.

Democrats are preparing to grill Mike Waltz about the Signal chat scandal when he appears at a confirmation hearing to be the next U.S. Ambassador to the United Nations. NBC News’ Gabe Gutierrez reports more.

The fired national security adviser engaged in intense coordination with Israeli Prime Minister Benjamin Netanyahu about military options against Iran ahead of an Oval Office meeting between the Israeli leader and Trump,

It wasn’t just Signalgate that led to Mike Waltz being canned as President Donald Trump‘s national security adviser. Before that scandal, Waltz had already angered Trump by going behind his back to talk with Israeli Prime Minister Benjamin Netanyahu about waging war on Iran,

Mike Waltz discussed the possibility of striking Iran with Israeli Prime Minister Benjamin Netanyahu. The move upset US President Donald Trump, reports The Washington Post. A few days ago, Trump dismissed Waltz from his position as National Security Advisor and appointed him US Ambassador to the UN.