General H.R. McMaster is a retired United States Army lieutenant general who served as the 26th United States National Security Advisor from 2017 to 2018. He is also known for his roles in the Gulf War, Operation Enduring Freedom, and Operation Iraqi Freedom and is currently a senior fellow at the Hoover Institution at Stanford University.  His books, "Battlegrounds" and "Dereliction of Duty" are bestsellers. He is host of the podcast "Battlegrounds: International Perspectives" and a regular on the podcast "Goodfellows." Learn more about your ad choices. Visit podcastchoices.com/adchoices