2016 should be forever remembered as the year the Democratic Party fully embraced it's shift to the right side of the political spectrum. As they've solicited campaign cash from Wall Street, Republicans donors, corporate lobbyists, etc., they've mocked progressives. For example, anyone who is even half-paying attention to Hillary Clinton and her supporters is aware that they've been poo-pooing the idea of free public college and universal health coverage (even though it's done in other developed countries); that they've labeled Bernie Sanders and his supporters "pie-in-the sky dreamers" who don't now how the government works; and that they've frequently implied that Bernie Sanders' supporters are misogynists.
If you're a progressive, or a liberal Democrat, or an Independent who believes that public policy can promote the common good, and you're supporting Hillary Clinton, I think you need to ask yourself, "Why am I supporting a woman who is backed by financial fraudsters, backed by donors who support right-wing causes, and backed by corporate lobbyists who value investor profits over the economic security of tens of millions of workers?"
Voting for the Democratic Establishment is positive reinforcement for bad behavior. It's like giving your dog a treat every time it poops on your carpet.