A party-centered electoral system is better than a candidate-centered system

Sorry, but the Supreme Court said no multi-member districts a while ago, though I’m not sure what case it was.

I don’t think the Court ever said that. There’s a federal law saying that states with more than one House seat can’t have multi-member or at large elections, though.

In fact, the court upheld multi-member districts (for a state legislature) in Whitcomb v Chavis. The argument the court rejected was that multi-member districts were discriminatory against the poor and minorities, and also that they unconstitutionally diluted votes.

Post 7 from the Ontario thread:

Considering what I’ve seen of the inner workings of the GOP & the Dems in my hometown, I think that’s a fair reason.