If the US House had Proportional Representation, what Parties'd be in it?

[liberalpragmatist]

This is all TOTALLY theoretical. But here's what I think:

We wouldn't have a complete multiparty system. I think we'd still be dominated by the Democratic and Republican Parties although each party would have maybe one or two affiliated parties on it's ideological extreme and there'd probably be one or two centrist swing parties.

I think the House would look like this:

* Two huge blocks of Democrats and Republicans, respectively, occupying 80-90% of the seats, though possibly around 75% depending on the political climate.

* About 15-20 members of the Green Party.

* A similar number of members of a "Christian Values Party".

* A coast-based centrist swing party, socially-liberal, economically conservative that is affiliated with the Republican Party on the coasts. Say, "New National Party". abt. 20+

* A southern/western-based swing party, mostly socially-conservative-ish but economically liberal/populist which is affiliated with the Dems in the South and West i.e. a so-called "Populist Party". abt. 20+

Depending on what type of PR is used in this alternate universe, there might be a few members here and there of small regional or narrow-ideological parties. Perhaps a handful of members from the NY Working Families' Party and NY Conservative Party. Maybe a couple of Libertarians, some independents. Possibly some members of an urban-based African-American Party from some inner city districts.

These groups would form two large blocs, one centered around the Democrats, one around the Republicans. The "New National Party" and maybe the "Populist Party" might swing between sides depending on the political climate.

EDIT: Much would depend on what TYPE of PR. If it was a mixed-member system with a NATIONAL vote, the Green Party and perhaps a Christian Party, maybe a centrist party, would probably score higher percentages, such as 5 or 6 or 7%. In that case, there'd have to be a threshold, ala Germany, probably of about 5%. If PR were done more locally, however, I think there'd be more parties, but smaller third-party factions.

[Liberalboy]

1. It would definately be

more representative...sigh

[Radical Activist]

2. I'd love to see that happen

We need more than two parties to reflect the views of all people. It would be neat to have some Greens and libertarians in Congress.
I'm guessing the Dems and Republicans would move farther to the left and right, while a centrist party would rise up. That would have been the role of the Reform Party if we had a multi-party system.