It started with the generals. Mattis. Kelley. McMaster. Along with Rex Tillerson, they were part of the “Axis of Adults,” the ones, as the story of this presidency has been told, who stood between President Trump and chaos – between President Trump and his own, unchecked impulses, particularly in foreign affairs.

As we know now, only Trump is left standing. And he stands impeached, because, the U.S. House of Representatives found, he couldn’t withstand his unchecked impulses and withheld U.S. military aid and White House prestige from Ukraine unless our ally announced investigations into his political rival.

How did we get here? What happened to the defense and security these generals – heads of defense, security and more – were supposed to provide? And, not for nothing, where are they and what are they saying now?

Peter Bergen is here to tell us. His new book is Trump and His Generals: The Cost of Chaos. Bergen seems to have been inside the room for all of the details – the fights, debates, wins, losses. His goal: “To reveal what happens when the unstoppable force of President Trump meets the immovable object of America’s national security establishment.”

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