As Cabinet members snarl at representatives and senators, and social media fills with semiliterate trolling and insults by public officials, we need to remember that rhetoric—the art of persuasive speech—still matters. Marco Rubio, the U.S. secretary of state, gave an excellent demonstration of that fact at this year’s Munich Security Conference. Any contemporary speech carries the burden of multiple audiences. In this administration, the first and most important is the volatile and tempestuous