If the issue of abortion stands alone it will have overwhelming support but when tied to a cult personality the margin narrows, by how much is indeed uncertain.

Beyond human concerns, in fighting and personal interests there is the fact that the Earth has defenses against our 8 billion+ over population. They are called limits. I remember as a kid when we were at 3 billion strong. I won't pretend we are at a population high water mark but I admit it feels that way. Yep population is exponential but what feeds us is incremental. Limits are out there somewhere and they won't be pretty. In fact they aren't pretty now are they?