How can people in safe states i.e. California help voters in states that are getting the most voter suppression efforts aimed at them?
Expect long lines in Democratic districts in those states. Provide anything and everything legal to assist people to vote. If it rains give them umbrellas, if it’s hot provide water, shade … seats. Whatever each locality needs most.
Be prepared to counter the poll watchers / monitors that the republican party has threatened to put in districts all over the country. If you can, if you feel it is something you can do, go and watch the watchers.