Mary McCord, Former Acting Assistant Attorney General for National Security at the Justice Department join Nicolle Wallace on Deadline White House with reaction to new stunning reporting by the Washington Post,

Democratic leaders of key House committees are reigniting calling for National Security Advisor Mike Waltz to step down.

When Donald Trump selected Mike Waltz to serve as national security adviser, the choice was widely seen as win-win: A combat veteran with four Bronze Stars would bring his judgment to the White House and his deep-red Florida House district was safe in Republican hands.

Her quotes capped off a remarkable, weeklong stretch that began after The Atlantic’s editor-in-chief, Jeffrey Goldberg, reported that he’d been added to a Signal group chat with senior White House defense officials, including Waltz and Defense Secretary Pete Hegseth, in which the officials discussed plans to attack Houthi rebels in Yemen.

The White House considers the Signal chat leak case "closed," press secretary Karoline Leavitt told the media Monday.

In public, White House National Security Advisor Mike Waltz is struggling. In private, there's reason to believe his troubles appear even more serious.

The Trump administration sought to put the scandal over its use of the Signal messaging app behind it on Monday, calling it case closed, even as the breach provoked bipartisan criticism and opened up divisions inside the White House.

National security adviser Mike Waltz, under pressure over the “Signalgate” scandal, briefly attended Trump’s meeting with Loomer to defend his team, according to The New York Times, which previously reported the meeting. Axios previously reported on the NSC firings.

As the president has made it very clear, Mike Waltz continues to be an important part of his national security team. And this case has been closed here at the White House, as far as we are