Tucker Carlson slapped his nicotine-pouch container down on the table and got straight into it: “Nick Fuentes, thank you for doing this,” he said. “I want to understand what you believe, and I want to give you a chance, in a minute, to just lay it out.” The two were sitting in Carlson’s barn turned podcast studio at his home in Maine. In a more-than-two-hour-long episode of The Tucker Carlson Show that aired earlier this week, Carlson gave Fuentes, the 27-year-old white-nationalist influencer, access to one of the largest audiences he has ever had. Although Fuentes has many dedicated fans,...