I don't think PR would work for the US, at least in its most common(?) form where people vote for parties and each party has a list of candidates. A big proble

I don't think PR would work for the US, at least in its most common(?) form where people vote for parties and each party has a list of candidates. A big problem with Gerrymandering is that it favors extremists. When a district is competitive, a candidate must appeal broadly to people of various political positions. When a district is artificially created to cater to party X, a candidate only has to be selected by party X, because then they're practically guaranteed to win. Thus candidates who are more loyal to party X is more likely to be elected, regardless of how they're viewed by the general population. PR has the same problem - someone who's at #1 position of Party X's list is as good as elected, and the position is determined by internal party politics. Thus, the top positions will be filled by those who always toe the party line and never compromise.