[Brown Deer]

Does this mean all the legal immigrants we have had in the last 60 years who had children born in the US before their parents acquired citizenship are not natural born US citizens?

Correct.

[kabar]

That has to be tested in the courts. It is not settled law. Birthright citizenship is the law of the land. You automatically become a citizen under jus solis regardless of who your parents are with all the rights and privileges US citizenship offers.