This special episode comes from “On the Media” ’s Peabody-winning series “The Divided Dial,” reported by Katie Thornton. You know A.M. and F.M. radio. But did you know that there is a whole other world of radio surrounding us at all times? It’s called shortwave—and, thanks to a quirk of science that lets broadcasters bounce radio waves off the ionosphere, it can reach thousands of miles, penetrating rough terrain and geopolitical boundaries. How did this instantaneous, global, mass communication tool—a sort of internet-before-the-internet—go from a utopian experiment in international connection to a hardened tool of information warfare and propaganda? This first episode of Season 2 of “The Divided Dial” is called “Fishing in the Night.”

Nearly a year ago, a Presidential debate between Donald Trump and Joe Biden, moderated by Jake Tapper and Dana Bash of CNN, began the end of Biden’s bid for a second term. The President struggled to make points, complete sentences, and remember facts; he spoke in a raspy whisper. This was not the first time voters expressed concern about Biden’s age, but his decline was shocking to many, and suddenly Trump seemed likely to win in a landslide. New reporting by Tapper and Thompson reveals that the debate was no fluke at all. In “How Joe Biden Handed the Presidency to Donald Trump” (an excerpt from their new book “Original Sin: President Biden’s Decline, Its Cover-Up, and His Disastrous Choice to Run Again”), they lay out a case that the latter half of Biden’s Presidency was carefully stage-managed by his top aides; Biden would often end the workday as early as four-thirty. “What [aides and] others would say is, ‘His decision-making was always fine.’ The job of the President is not just decision-making. It’s also communication,” Tapper tells David Remnick. “If you are a President . . . and you’re not able to go into a room full of donors and speak extemporaneously for ten minutes, then there’s something wrong. And that was happening in 2023.”

Florida Governor Ron DeSantis has shown himself uniquely skilled at attracting attention beyond the borders of his home state.  Just this month, DeSantis blocked state funds for the Tampa Bay Rays stadium after players voiced support for gun control in the wake of the mass shooting in Uvalde, Texas.  He’s also continuing a fight to punish the Disney Corporation for criticizing Florida’s so-called Don’t Say Gay law.  An Ivy League-educated anti-élitist firebrand, he is willing to pick a fight with anyone—reporters, health officials, teachers, Mickey Mouse—to grab a headline. DeSantis “practically radiates ambition,” the staff writer Dexter Filkins tells David Remnick. “He sounds like Trump, except that he speaks in complete sentences. … He’s very good at staking out a position and pounding the table and saying, I’m not giving in to the liberals in the Northeast.” Yet despite having been anointed by Donald Trump in his primary election, DeSantis has refused to “kiss the ring,” and many see DeSantis as a possible opponent to Trump in a 2024 Republican primary.