These people, like people everyone, vote in their self interest. They vote for guys who speak their language. Trump did that, Hillary didn't, as simple as that. Hillary's poll-tested politician speak mumbo jumbo was so condescending.
You know what the most pathetic thing about all this is? These working class whites in MI, and PA, and WI were the last ones who stayed loyal to you. When the working class whites in the South and the West and in Appalachia left, the ones in the Upper Midwest stayed. They were your firewall, or tried to be, in the last 4 cycles. They faithfully pulled the party lever, even when you guys were doing nothing for them, for 20 years. And now they get to be the deplorables for not being dutiful little soldiers, ha ha.
The idea that the Democrats haven't done anything for the white working class is preposterous. I agree that there was a massive marketing failure on the part of the Democratic party in this election (with plenty of other blame to go around, but the party and its candidates deserve a healthy share), but Democratic policies have clearly been much better for the economic well being of these voters for 80 years now as compared to Republican policies.