I'm sorry if I haven't checked in today, I have had a GIS project that came up which will hopefully get me campaign work. Anyway...
-Welsh regionalism I feel lacks the numbers to actually play a role. I see perhaps 8 Welsh majority seats max nationally. This isn't enough for regionalism. However the way we are building the country basically forces electoral fusion along racial lines, so perhaps the big tents will have minor Welsh parties in their coalition.
-PM list, go right ahead. I'm also nearing the end district-wise, and will probably move south for worldbuilding post-ethnic map.
- I'm all for more White Scandinavian ethnic groups. Just be aware that the plains are a region settled late and those groups are late settlers. They are settling alongside the telegraph and national schools. The language will probably be lost, whereas the earlier arrivals have time to establish themselves as permanent institutions. The cultures can survive, especially if it's mainly germans and Scandinavians settling the upper midwest and north plains.