The latest chart from Steve Hayward, Power Line's roving academic, shows blue dots for counties won by Democrats and pink dots for counties won by Republicans. I presume the gray dots were counties effectively (or actually) tied.
How the counties voted is plotted against the total fertility rate for that county (births per adult female). What you see is that Republican counties have higher birth rates than Democratic counties. The differences shown are statistically significant, unlikely to occur by chance. Hayward concludes:
Red counties that Trump carried have higher fertility rates than Democratic blue counties. Tells you something about who is optimistic about the future.
Or maybe, about who is sane enough to cope with the stresses of child-rearing. They are non-trivial.
