We already did. It's the 14th amendment. The Supreme Court must rule that abortion deprives unborn persons of life without due process.
Abortion is always wrong. Leaving it up to the states would be like leaving slavery up to the states.
Passing an Amendment lays it out once and for all. As the father of two beautiful kids, I'd support such an Amendment. Doing it the way we are currently doing it is unConstitutional and actively dangerous to the protections for our other liberties.
Don't kill the patient curing the disease.