[deepsun]

Forbid Gerrymandering.

E.g. Republican Schwarzenegger has been advocating against gerrymandering for a long time.

Force all states to cast election votes to be proportional to citizens' votes (some states do but others do not).

[analog31]

I realize this is just my own idea, but I think the Constitution forbids gerrymandering, by demanding a "republican form of government" in the states. The question is how this opinion would stand up to being tested by the current Supreme Court.