Assuming she’s well enough to run in 2020, I don’t see any way the Democrat party will back her for the nomination. She lost in 2008. She lost again in 2016, despite the fact that the party and their friends in the media threw their full support behind her. There’s absolutely no reason to believe that she will magically become a better, more attractive candidate in 2020. If she does run, she won’t make it past the first few primaries.
You are right she lost in 2008 and 2016. But to her and her loyal group of flatters, consultants, and so forth. The losses were not her fault. She believes she should have beaten Donald Trump by 50 points