Trump backs top adviser who accidentally added journalist to secret air strike chat

 In fresh comments to NBC News, the president is standing by National Security Advisor Mike Waltz, who allegedly admitted journalist Jeffrey Goldberg into the Signal group chat.

"Michael Waltz has learned a lesson, and he’s a good man," he says.

Trump called it a "glitch" that Goldberg was added, and said a staffer of Waltz is to blame.

Goldberg's presence in the chat had "no impact at all" on the operation, Trump adds.