There may not be many laws governing how former presidents should interact with the current commander-in-chief, or with each other, or how the sitting president should treat his or her predecessors. But over time, we have developed a body of norms about how to do so appropriately. Donald Trump has, to put it mildly, changed expectations about the relationships that presidents past and present have with each other. David Priess recently sat down in the virtual jungle studio to chat with Kate Andersen Brower, author of "Team of Five: The Presidents Club in the Age of Trump," in which she describes these dynamics among the few people to know what it is actually like to be president. They talked about her interview with Donald Trump to get at his feelings toward his predecessors, the unwritten rules of the Presidents Club and about what his post-presidency might look like.