In the Slate Plus bonus segment of Thursday’s edition of the Political Gabfest, hosts Emily Bazelon, John Dickerson, and David Plotz brainstorm a list of presidential prerequisites—everything presidential candidates should be required to see and do before they run. Pass a standard high school government test? Interact with people poorer than you? See the Gettysburg Battlefield? Show some basic semblance of human empathy? Or does too much empathy hold a president back?