When a "Kenyan Muslim Marxist God Damn America black man" can win twice decisively, both popular and electoral vote, against much better candidates than Trump in a white majority America, the Rust belt was never the problem, put the blame where it belongs, the many millions of Democrat voters that couldn't bother to go vote.
Yep, they couldn't be bothered to vote. I said it months ago, that if she lost, it would be because of lack of voter turnout. Many people got comfortable with the notion of her being a shoe in. I heard many people I know say her presidency was "automatic", or "we've got this". To be fair, there was voter apathy on both sides. This is what happens when we have two unpopular candidates running. Nobody was excited.