Subject, citizen. To-may-to, to-mah-to. The intent is the same, and so far as Blackstone is concerned, and James Madison for that matter, it was location of birth and not citizenship of the parents. Now you may not agree with that, and I honestly don't care if you don't, but it does show your claim of a single definition of natural-born citizenship to be incorrect.
You well know that the Madison quote is regarding the seating of a congressman (Smith of SC), NOT the president. Had nothing to do with natural Born Citizenship. You Obots always take it out of context.