One could say that we got into the mess we are in because of the amendments voted in between 1913 and 1920 during the first wave of progressives.
And let’s not forget the power of those first wave Progressives came as a result of the massive wave of late 19th and early 20th Century Southern and Eastern European immigration.
People like to point out how we assimilated large numbers of immigrants before so we can do it now. But that’s a dishonest statement. Yes they assimilated culturally and linguistically but not without massively changing the political landscape of the country. The Immigration Act of 1924 was a reaction to this. That’s why the third wave of the left overturned it Immigration Act of 1965.
The grandchildren and great grandchildren of those immigrants still make up a large portion of the urban liberals to this day.