The argument that the 14th Amendment does not automatic citizenship to everyone born in the US and “and subject to the jurisdiction thereof” is total BS. Undocumented immigrants are subject to US jurisdiction. If they weren’t, we couldn’t try them for any crimes they might commit. The language was originally there so that Native Americans (regarded by legal fiction as sovereign nations) wouldn’t become citizens (Congress granted them citizenship in 1924). Nowadays, the only people born here and not subject to US jurisdiction are the children of diplomats (who have diplomatic immunity). They’re not citizens.