Puerto Ricans are automatically U.S. citizens. If they're not Puerto Ricans, they're not automatically U.S. citizens.
Was that hard?
Because you stated "They are all natural-born American citizens." And that's not necessarily true unless of course you know the backgrounds on each and every one of them.
Which is why I asked that question.
Puerto Ricans are automatically U.S. citizens."
But not all U.S. "citizens" are "natural born Citizens", regardless of location. There is a distinction.