She wasn't the best they had in 2016, but her and Bubba control(led) the Demwack party, and no one could stop them from commandeering the whole process.
We shall see about 2020, but I'm betting she's too feeble to run then.
I contend that she was the best they had in 2016, on the basis that anyone better could have beat her, even though she cheated every way she could. Obama did just that.