1) Identity Politics. Her slogan was "I'm with Her" (the worst political slogan in the history of democracy) and the main political argument was that she was a "supremely qualified woman".
2) Deplorables... the idea that people who don't accept her philosophy are morally defective.
This is a mischaracterization of her words. I really don't want to go to source and quote exactly what she said, but I will if you press it. But she meant that usually those who chanted the loudest at Trump's rallies had deplorable views. They were, his fans seemed to be alt-right nationalist for the most part before he was elected and regular republicans climbed on board. However, I remember when she uttered those words and my dad saying, that was a huge mistake on her part and I at the time didn't agree but now in hindsight, she did bring on her own damage with that word.
The liberal movement running the Democratic Party is based on a narrative that White Men are privileged and are actively oppressing women and minorities. The problem with this is that it alienates large portions of the public; when White coal miners in Ohio and Pennsylvania hear this... they rightfully feel it is nonsense to suggest they are privileged.
I don't know about you but I live in an area where there used to be a lot of coal miners and I don't remember too many white women coal miners. If they were managers, nine to one, they wouldn't have gotten the same equal pay as the white male coal miners. The chances of a black man or woman even getting a good paying position in coal mining company are even less than that. Identity politics are there for a need.
My problem with this is that the Clinton wing of the Democratic party puts the narrative above actual policy positions. They are more interested in demonizing segments of the American public then they are about actually solving problems.
This is an unsubstantiated opinion. Hillary Clinton has always been a hard worker with real issues that matter to people. She is just not a good politician and never has been.
This is my opinion, of course... but if enough people feel alienated by the Democratic party, Trump will win again.
She won the popular vote by a healthy margin so many people did not feel aliented by Hillary Clinton. She had many problems but at the last minute Coney announcing the reopening of the stupid email investigation hurt her, plus she didn't compaign hard enough in the key swing states at the last of the elction cycle. She stayed in blue areas too much, areas she already won. Lastly, having Bill Clinton (although I still admire and like him personally) around her during the "Me Too" movement didn't do her any favors.