Ah, due to the two party system that has a stranglehold on the US system and the nature of our primary system, there are A LOT of unaffiliated independent voters. There would likely be a lot of unaffiliated candidates if the number in the House was drastically and suddenly increased. There would be no party whips to whip. There might not even be enough representatives of the major parties to even form a collation, at least in the start.