It is a combination of things, voter suppression being one of them and a common tie breaker in battleground states.

When there is a shift, voter suppression is a common denominator on flipping close states. I’m just talking about one part of the overall issue, not saying it is the entire issue.

Since California was your chosen state to target:

Trump got less votes this time than before, the Dems lost way more, and still beat him by a pretty decent margin

What this tells you should be pretty fuckin obvious, because it’s been said loudly since before the election: the Dems ran a dog shit campaign that even their usual supporters hated. Courting the Cheney’s was a mistake