"0900, Thursday, July 25, 2019: President Trump called Ukraine’s President Zelensky, supposedly to congratulate him on his recent victory. In the months that followed, the American public would only learn what happened on that call because Alexander Vindman felt duty-bound to report it up the chain of command: that the President of the United States had extorted a foreign ally to damage a political challenger at home. Vindman’s actions and subsequent...