We don't need an amendment. Despite what people think, this is not a settled issue of constitutional law, as the Supreme Court has never explicitly ruled on it. Congress could eliminate birthright citizenship in these cases and it would not necessarily be found unconstitutional. It certainly isn't against the plain intent of the amendment, which was to nullify the Dred Scott decision so the Supreme Court couldn't rule against Congress granting citizenship to the slaves.
thank you...i wondered that