Quote from Free Thinker:
states generally lose power because they trample on the rights of the less powerful individual. states do not have the right to make unconstitutional laws forcing people to the back of the bus. if there is a constitutional right for a woman to choose what she does with her body a state does not have the right to pass laws prohibiting it.
That's not what the states are doing. They are protecting the rights of the unborn child. The state always defers down to the lowest level of defense as in this case there are two separate issues with rights. That of the woman and that of her unborn. The unborn is defenseless and the state always will protect those who can't protect themselves.