So just for reference, here's a Wikipedia article about this amendment https://en.m.wikipedia.org/wiki/Congressional_Apportionment_...

You wind up with one representative for every 50,000 people, minimum. Currently, the number of representatives is decided by congress, and the districts are drawn up by them as well. So you've got districts with overrepresented constituents, just like states with the electoral college. It is capped at 435 currently. The parties of course collude to keep it this way, they agree to trade power when redistricting and stuff like that.

With one representative per 50,000 minimum, you wind up with a house that would be, today, about 7000 members. And most of what they do can be passed by a simple majority. House representatives have to campaign directly to their constituents, having that few per means they have to get closer to what they want, which means that, as far as direct legislative representation goes, the pressure to run on overarching political football platforms wanes and the pressure to run on niche and local concerns dominates. With simple majority in the house for most things, that means you have to deliver on a lot more of those local concerns to get anything passed, because half of 7000 people is going to be hard to whip up for a vote on anything.

So you may get some aligned groups caucusing together, you may get them nominally under the same umbrella, you'll get coalitions, all just like happens in Europe, but people will get more granular, close to home representation.