IDK to what extent foreign politics gets discussed in the states, but I think it's worth noting that political culture in a lot of places has been shifting to a

IDK to what extent foreign politics gets discussed in the states, but I think it's worth noting that political culture in a lot of places has been shifting to a more multiparty norm. Emphasis on culture. While voting systems and mechanics obviously play a huge role, political culture is (IMO) a very big factor... perhaps the deciding factor. Here (in Ireland) we have moved from a "two party with exceptions" system to a full multiparty system within a few elections. It now take >2 parties to form a majority. This isn't an uncommon story. A point I made recently to American friends who are in favour of these kinds of changes was: The US has tons of elected positions. That is a lot of surface area that these changes can grow on.