The American senator of the title is Elias Gotobed, who sits in the US Senate for the fictional state of Mikewa. The guest of John Morton, Senator Gotobed is trying to learn about England and the English. Through his often-tactless remarks in conversation, through his letters to a friend in America, and through a lecture in London titled "The Irrationality of Englishmen", he comments on British justice and government, the Church of England, the custom of primogeniture, and other aspects of English life.