President Donald Trump said he is confident in his national security adviser, Mike Waltz -- a day after a report detailed how he inadvertently added a journalist to a Signal group chat discussing Yemen war plans. Trump told NBC News on Tuesday that Waltz "has learned a lesson and is a good man."

Mr. Waltz has worked hard to burnish his credentials among the president’s supporters, in the process dismaying his former associates while not convincing his new ones.