Mike Waltz, President Donald Trump’s nominee for U.S. ambassador to the United Nations, is facing questioning Tuesday from lawmakers for the first time since he was ousted as national security adviser in the weeks after he mistakenly added a journalist to a private Signal chat used to discuss sensitive military plans.

President Trump's former national security adviser was pressed on the inclusion of a journalist on a sensitive group chat discussing war plans.

Senators questioned ex-Trump national security adviser Michael Waltz at confirmation hearing about a Signal chat that contained sensitive information.

Mike Waltz, President Donald Trump’s nominee for U.S. ambassador to the United Nations, appeared before the Senate Foreign Relations Committee on Tuesday for his confirmation hearing.