I will not vote for Hillary Clinton. I reject the "lesser of two evils" argument.
I believe that Hillary Clinton is in the pocket of Wall Street, a lacky by any definition. I also believe that she is, as Ralph Nader says, a poster child for the military industrial complex. I also don't like her close ties to agribusiness giant Monsanto and her advocacy for the industry's genetically modified crops.
I believe that our two party system is broken, almost never giving us a choice that matches the preferences of the electorate. Corporate news corporations favor Clinton over Bernie Sanders in subtle and unfair ways, basing so much of their slanted (as directed to the financial interests of the network owners) discussion in terms assuming Hillary Clinton will be the Democratic candidate and pushing the false narrative that Bernie Sanders has no chance of winning the general election.
Some of my friends who are Democrats believe that it is a mistake to not vote for whatever Democratic toadie the establishment runs. What if a Republican wins? Oh NOoos! The sky will fall.
I believe that the sky will fall on our representative democracy if people don't stand up to the political establishment and the corporations that their preferred candidates represent.