A person is a human being. The unborn are human beings. I don't see much wiggle room there. If they meant citizens, they would have said citizens.
However, I agree that Congress should make it clear that the unborn are persons re, the constitution. At the March for Life, President Bush expressed that same opinion.
The 14th said "persons" and by that meant human beings who were born. Reread Scalia's comments in the article. If you go by strict interpretation and original intent, it is clear they meant born human beings. eg. we dont count preborn in census numbers.
However, I agree that Congress should make it clear that the unborn are persons re, the constitution. At the March for Life, President Bush expressed that same opinion.