Well, in your scenario, and that of Thompson, Romney and Giuliani, if babies are not persons with a God-given and unalienable right to life, there is not even any basis for overturning Roe to begin with, much less outlawing it in any of the several states.
However, if they are persons, as common sense, science, and morality dictate, then Roe goes, and so does every abortion in America, because those persons are persons as defined by the Fourteenth Amendment, as even the judges who decided Roe admitted in their infamous decision.
I think every baby deserves life, but overturning Roe V Wade is POSSIBLE. What you want may not be possible for decades.
We need to take every victory we can, even if it is only a partial victory.