I feel like most of these changes would require a constitutional amendment.
We don't just need a Constitutional amendment, we need a new Constitution. People act like the Constitution we have came down from the heavens in a beam of light. But it was written by a bunch of guys who had never lived in a real democracy before. In fact it was written at a time when there pretty much hadn't been ANY democracies in the whole world for two thousand years. We've had two hundred years of experience an…
Uh you can achieve that via amendments. And just who is going to write this new Constitution?
> Washington is entirely a function of the rules that are set by the Constitution.
And all of the Supreme Court precedents that have bent the hell out of the document such that it's hardly the same document that it was 200 years ago.
States could, if they wanted to, implement proportional representation themselves without having to amend the Constitution. It obviously wouldn't mean that the entirety of Congress is proportional, but it'd be a start.