Will every living Democrat run for president?

"So Marianne Willamson?" I say to my wife. "She's a New Age guru from California, 66 years old. Has written books on how to use magic to lose weight. Announced last year in November. Is she real?" "You couldn't make this up, so yes." This is a game we have started playing. One of us gives a name and a brief C.V. and says how long he or she has purportedly been seeking the Democratic presidential nomination in 2020. Sometimes the names and credentials are indeed real. Other times we make up peopl...