As I read “The Keys,” a new book collecting the motivational wisdom of DJ Khaled, I kept returning to the same question: Could this man someday become President? The forty-one-year-old has demonstrated an uncommon gift for connecting with people—first as a d.j. in Miami, where he helped establish the city’s place in hip-hop’s mainstream, and now as a kind of human meme, a Snapchat superstar who has used the video-sharing platform to document his love for watering plants, the time he got lost on his Jet Ski, the birth of his son. It may seem absurd to speculate about a political future for Khaled, but over the past few weeks I’ve found myself wondering about the power of charisma and the strange places that fame can take a person in America, particularly when that fame is fused with an uncanny knack for inspiring followers. And so I wondered, What kind of citizenry does “The Keys” imagine? Would Khaled rule us with care and benevolence?