No, fuckwit, "we" haven't established that. This is going to end up in the supreme court, and Arizona is going to win. You want to know why? Because "and subject to the jurisdiction thereof" wasn't just to fill space on the page and actually means something. Anyone who is subject to a foreign power (i.e. a non US citizen) cannot pass on the birthright of US citizenship, because they don't have it to begin with. Just like I can't have a chinese baby unless I knock up a chinese girl.