It could happen. Right now, a lot of Sanders' supporters are thinking hard about not voting or finding a third party candidate to give their vote to, thanks to Bernie's painting Hillary Clinton as being anti-progressive. The way many of them see it, if they can't have $15 as a minimum wage [[something Bernie couldn't promise would happen, BTW), they'd just as soon have a madman who will cost millions their jobs instead of someone who might be able to raise it to $12. Instead of free education at state universities, they'll take someone who will abolish the Department of Education over Clinton, who shares similar views to their candidate.

I don't think most will feel this way after the debates, but many [[like Cenk Uygur of "The Young Turks") are so butt hurt, they're willing to see at least four years of Donald Trump's America come into being. It seems that the US and British voters have a lot in common as far as the responsibilities and consequences of democratic action/inaction.