Stephen Colbert chats with Brett McGurk, CNN national security analyst and former Middle East advisor to four presidents, who warns that President Trump has entered into a war without communicating clear objectives and a clear plan on how to achieve them. #Colbert #BrettMcGurk #Iran #War #PresidentTrump #StephenColbert #TheLateShow Subscribe To "The Late Show" Channel: http://bit.ly/ColbertYouTube Watch full episodes of "The Late Show": http://bit.ly/1Puei40 Listen to "The Late Show Pod Show"