Just solve it scientifically, after a foetus gets a brain and is aware its alive an abortion shouldn't be legal anymore. Before its a bunch of cells that are building, but have not created an being that is actually alive or aware of that.
I don't like the idea settling this religiously, because the US knows freedom of belief, which counts for religious people and Atheists. Democratically trough a referendum is going to be influenced to much by populism. I am very much pro choice, but I am not a female or a theist, but an atheist male and a liberal. Scientists should answer this question though. Mainly whether abortion is baby murder. Also after how many weeks past impregnation is abortion killing q sentient self aware being.
Please excuse my (probally) poor grammar







