It is now clear that important thinkers have endorsed the idea of proportional representation. One even accepts the possibility of a multi-party chamber.
No doubt, some of this support is due to the fact that Democrats may need proportional voting. Their votes are now so geographically concentrated that, even with a popular vote exceeding Obama’s 2008 performance, they may not carry the House next week. The question is how you pass PR in a party-line world. Spoiler: you probably need Republican votes and therefore to mandate low nomination barriers.