By John L. Micek

To say there’s a lot riding on the U.S. Supreme Court’s eventual ruling in a case challenging Mississippi’s restrictive abortion ban is a galactic understatement.

If, as currently appears the case, the court effectively topples Roe v. Wade, the 1973 precedent that declared a constitutional right to abortion, regulation of the practice would return to the states — a nightmare scenario if ever there was one.

As many as two-dozen states could move to ban aborti...