 Questions now. Will anyone challenge the vice president for the nomination? Who could her VP pick be? When does all this have to be decided? How does any of this work? We're going to get to all of that and more, including your reactions to Joe Biden stepping aside as the Democratic nominee for president. You can join the conversation by emailing us, 1A at WAMU.org. All that's to come. First, let's dig into how this earthquake news came to be on a Sunday afternoon at the president's home in Rehoboth, Georgia.