Digging up new information and speculating on it isn't your primary purpose when you're writing a biography intended for young readers, unless you find compelling evidence that departs from the accepted wisdom. A biography for young people calls for the demanding art of distillation, the art of storytelling, and your responsibility is to stick as closely as possible to the documented record.
Well, I certainly hope the Democrats participate. I continue to think that some things transcend politics like the murder of four of our fellow citizens and whether or not you trust government. That is not a red or blue issue. That is an American issue. As for whether or not they boycott, I hope they don't.