Let's assume every single Republican in an elected position of power is corrupt. Do Democrats practically have any power to save America?

I've disliked politics ever since Trump first got elected (big surprise) and now I'm just ficking terrified of this country being burned to the ground and turned into Russia 2.0.

I know some Democrats are pushing back and speaking out. AOC is the only one I can name off the top of my head but I know there are more, but is it enough? Do we even have the numbers?