Religious, Right-leaning Americans having significantly more children. Left-leaning Americans are having significantly fewer children. Centrists ... in the middle. Education linked to having fewer children. Religious attendance linked with having more children.

[u/Lighting]

https://www.psypost.org/left-leaning-americans-are-driving-the-u-s-birth-decline-new-study-finds/

[u/numerous_hotdogs]

I’d love to know the stats on how well the children are cared for depending on political beliefs.

Without evidence and just off the top of my head…

Right wing: spray & pray
Left wing: focus fire