> As for the people not in South Carolina, they should work to pass an amendment or secede from the union, those are the only legal options if you believe in how the federal government is supposed to work

It's not legal to secede from the US, we fought an entire war because it was not a right of the states. Most of what you say ignores the reality of our political system, voter suppression, who draw districts, filibuster, etc. Which makes it more difficult than "just vote". Which is why the Republicans went the route of Supreme Court justice appointment, so they could legislate via the court.

https://en.wikipedia.org/wiki/Federalist_Society