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”J. Baxter Oliphant for Pew Research Center: “Top tax frustrations for Americans: The feeling that some corporations, wealthy people don’t pay fair share”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”Emily: Charlotte Lytton for The Washington Post: “Long-hidden ruins of vast network of Maya cities could recast history”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. Tickets are free. RSVP here.  Listener chatter from Bob Rosner: Inti Pacheco for The Wall Street Journal: “The Monks Who Make Chartreuse Don’t Care About Your Fancy Cocktails” 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.”  In the latest edition of Gabfest Reads, Emily talks with Curtis Sittenfeld @csittenfeld about her book, Romantic Comedy. Join us for a live taping! Political Gabfest Live in Washington, D.C., Wednesday June 28, 7:30 p.m., Sixth & I, 600 I St. NW. Tickets are on sale now.  Email your chatters, questions, and comments to gabfest@slate.com or Tweet us @SlateGabfest. (Messages may be quoted by name unless the writer stipulates otherwise.) Podcast production by Cheyna Roth Research by Julie Huygen Learn more about your ad choices. Visit megaphone.fm/adchoices