Actually, I've seen stats showing the decline in white fertility is all in the northeastern liberal "stop at two" crowd. Christian Midwesterners are still doing fine. Besides, adding up a bunch of disparate minorities does not necessarily make a political majority.
Yep, I’ll bet a map showing white fertility rates would look a lot like a political map, with low rates in the blue areas and high everywhere else. I wonder if liberals have fully thought through the implications of that.