Rounding up and interning or killing people because of their race comes to mind. We’re putting neoNazis and their sympathizers into power; we know how such people act when they can. I expect the Republicans to go full Holocaust, eventually; except on a much larger scale and with nobody able to stop them.
I think the future of America is a racist theocracy with a collapsed economy, and maybe half the population it has now because the rest were expelled or killed. And the future of Mexico, South America and Africa is being radioactive wastelands after the Republicans bombard them to “purify the Earth of lesser, Satanic races”.