Why has Mike Waltz been dropped as US National Security Advisor?

Mike Waltz has been dropped as US national security advisor. It's the first big shift in personnel of Donald Trump's second term. Weeks ago, Waltz added a journalist to a chat group of senior officials sharing secret information. Is that why he's being moved - or is there more going on?

In this episode: 

• John Halterwanger, reporter at Foreign Policy Magazine covering U.S. national security
• Amy Koch, a Republican political strategist
• Matthew Bryza, a former U.S. diplomat and National Security Council official at the White House

Host: Nick Clark

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