By 2020 these demographic changes will have been done in American society:
1)Gen Y's agenda will dominant. It already dominates, but by then it will be clear even to the GOP.
2)America will be more urban, and suburban power will be over.
3)America will be majority minority. And minority majority.
100 years ago the rural farmers and their allies raced against the 1920 clock, when America would be majority in the cities, not on the farms. And the rural agenda of the 19th century faded.
We got the income tax, 40 hour work week, less inequality, direct election of Senators, and so on.
The clock is running out on the Tea Party. Older white men with high school degrees will no longer be able to win-out over Gen Y by 2020.