If a Personhood act was passed by Congress and signed by the President, the unborn would be recognized as persons with the Constitutional right to life, and abortion would then be illegal.
ONLY if that law stated that the Supreme Court, and the lower courts, had NO jurisdiction over the matter.
And, politically, this is probably not the right stand to take, in that the public does tend to support abortion in the “tough cases” and it is perfectly moral to address political reality, in the law.
That is best done at the state level.
More to the point, we should avoid federal murder charges, and let the states deal with regulation of doctors and the prosecution of illegal abortions.
We do that by simply telling the Fed courts to butt out, and the we craft our own laws, at the State level, the way our founders intended.
And if Hell freezes over...