This week, Emily Bazelon, John Dickerson, and David Plotz discuss the imminent X Date when the United States hits the debt ceiling and could default; the presidential campaign announcements of Ron DeSantis and Tim Scott; and the possibilities of regulating artificial intelligence. Here are some notes and references from this week's show: Ezra Klein for The New York Times: "Liberals Are Persuading Themselves of a Debt Ceiling Plan That Won't Work" John Dickerson for CBS News Prime Time: "Former Google executive speaks out against AI" Emily Conover for Science News Explores: "A new supercomputer just set a world record for speed" Here are this week's chatters: John: Oliver Whang for The New York Times: "A Paralyzed Man Can Walk Naturally Again With Brain and Spine Implants"; Henri Lorach, et al., for Nature: "Walking naturally after spinal cord injury using a brain-spine interface" David: NatureSweet Twilights tomato; join David at a live taping of City Cast DC on Saturday June 3 at 1 p.m., Right Proper Brewing's Brookland production house and tasting room. For this week's Slate Plus bonus segment, David, Emily, and John discuss Harlan Crow's collections and Graeme Wood's article in The Atlantic: "Inside the Garden of Evil." Tickets are on sale now.