Print This is the April 21, 2021, edition of the Essential Politics newsletter. Like what you’re reading? Sign up to get it in your inbox three times a week. Outgoing presidents often leave decisions for their successors to take on. Over the last two decades, and four presidents, how to end America’s longest war — in Afghanistan — has been among the largest open questions. President Biden inherited it from President Trump, who inherited it from President Obama, who took it from President George W. Bush. Unpopular, seemingly unending and unwinnable, the war is a case study in how the choices of one administration echo into the next.