MERRICA
Banned
This is OTL last I looked. The German population in America is the largest single ethnic group.
Anglo-American is smaller. I think Anglo-American, combined with the American ethnic group (which I believe is Scotch-Irish majority, among others), may be larger. But if it is, it isn't by much, and then you're really picking at technicalities.
Well, the German -American population was forcibly assimilated in WWI and to a much lesser extent in WW2. So I think a good wank of the German American population is for them to keep their heritage and for them to assimilate normally.