LA? Jesus Christ live in some working class/ areas of LA, you'll have a good mix of Latians, whites, some blacks, and asians. It's still democratic, the whites (from when I lived there) used to vote democratic, though a fair few switched to Trump. Being LA, the majority of whites still voted for Clinton, going for personal experience.
It's probably a trash hole, but it's a lovely trash hole.
Even in Westwood and the UCLA campus you can find Trump supporters. I probably live in one of the biggest liberal bubbles on this site (not particularly proud of that, but whatever), and I've been able to talk to a few Trump voters since the election. Even then, if someone really wanted to talk to Trump supporters in LA, apparently Milo's coming to UCLA