We are already in that situation and have been since 1973. Read Roe v. Wade and Doe v. Bolton sometime. A mother can have here child killed for any reason or no reason at all up until birth as long as the killing is committed by a licensed physician. It's abortion-killing on demand.
As we have discussed on this thread, I believe that Donald Trump's antics have given many Americans the incentive to take a second, and more realistic, look at the question of immigration. Perhaps people would do so on the question of abortion if more of our candidates were willing to talk about it.