The dumbest thing democrats could do is run Hillary again.
She already lost a race that should have been impossible to lose.
I don't disagree, but I will say that it wasn't just Hillary that lost that election for her. The entire Democratic Party underestimated Trump. Plenty of blame to go around. They didn't campaign hard enough, like, at all. Trump was busting his ass going to all these remote areas to drum up support. Say what you will about Trump, but he campaigned his ass off. I can almost guarantee that the Dems won't make that mistake again, trying to coast to a victory.
Also, Trump's approval ratings are abysmal. For these reasons, I could see Clinton running again. I agree that it wouldn't be the best idea and I doubt it will happen, but it's not beyond the realm of probability.
It was her fault. She let her campaign run the bernie bros bull shit. She spent months calling the people she would later need to depend on for votes sexist.
The DNC was corrupt as hell, but the campaign Hillary ran was idiotic. She ran like she was owed votes.