Before the poorly-written 14th amendment, black slaves were considered “property” not “persons”. Not really on point with the NBC issue.
The Fugitive Slave clause:
No person held to service or labor in one state, under the laws thereof, escaping into another, shall, in consequence of any law or regulation therein, be discharged from such service or labor, but shall be delivered up on claim of the party to whom such service or labor may be due.
and the famous,
... determined by adding to the whole number of free persons, including those bound to service for a term of years, and excluding Indians not taxed, three fifths of all other Persons.
For the census, they were counted as whole persons. For representation in Congress, three-fifths of their census total was counted.
The peculiar institution recognized a peculiar property right to the labor of an enslaved person, and holding that person in bondage.
Very closely intertwined. You would not believe how closely these two things are intertwined with each other.
William Rawle is the man most responsible for spreading the false claim that American citizenship derives from birth on the soil. He *KNEW* this was wrong, because the Supreme Court of Pennsylvania *TOLD* him this was wrong, in their Unanimous decision in Negress Flora vs Joseph Graisberry.
It was a *UNANIMOUS* decision. Now the court records are lost, though the verdict is remembered, but it is unquestionable that William Rawle tried his "Hey! She was born on the soil!" argument with them, and it didn't fly.
William Lewis was William Rawle's co-counsel on this case, and *HE* is the guy that trained Samuel Roberts, (who published the book mentioned above) and so there can be no question that Rawle had been told what was correct American law, and what was not.
Rawle waited till everybody who could contradict him was dead before he published his "A View of the Constitution" in 1829.
Why did Rawle lie? Why did he publish a book with this very specific lie in it?
He was trying to free the slaves. He was president of the Pennsylvania abolition society, and he was trying to use a legal trick to free the slaves. A trick that had already worked in other states, but a trick which was not working in Pennsylvania.
By arguing that anyone born on the soil was a "citizen", he could claim slaves were free "citizens", and not slaves.
He never had any success with this during his lifetime, but he certainly polluted subsequent understanding of how a citizen was defined or created.
So you see, Freedom for Slaves was *VERY* connected to Presidential eligibility.