US National Security Advisor Michael Waltz took full responsibility for adding the journalist to a Signal group chat, which included several senior Trump officials, and which discussed plans for a possible attack on the Houthis in Yemen .
"I take full responsibility. I built the group ," Waltz said on "The Ingraham Angle." "It's embarrassing. We're going to find out what happened."
The Atlantic magazine's editor-in-chief, Jeffrey Goldberg, revealed that President Donald Trump's national security team added him to a top-secret conversation about military strikes in Yemen, called the "Houthi PC Small Group."
The group also included Secretary of State Marco Rubio, Secretary of Defense Pete Hegseth, and Director of National Intelligence Tulsi Gabbard.
Waltz also expressed some criticism to The Atlantic, saying he didn't know Goldberg outside of what the NSA described as his "terrible reputation."
"I can tell you 100% that I don't know this man. I know him for his terrible reputation, and he really is the worst of journalists. And I know him in the sense that he hates the president, but I don't text him. It wasn't on my phone. And we'll figure out how that happened," Waltz said.
Waltz also addressed the president's comments to NBC on Tuesday that a staff member from Waltz's office was responsible for adding reporters to the chat group.
"No staff member was responsible," he said.
"Someone got the wrong number in someone else's contact. Now, whether they did it intentionally or it happened in some other technical way is something we're trying to figure out," he said.