Would you say that it is settled, definitively that anyone born on US soil is a Natural Born citizen or is there still something that needs to be done to settle it once and for all?
See my #874. It’s pretty settled IMHO in terms of how courts/SCOTUS would think (if you are born a US citizen, you are ‘natural-born citizen’)... “OTOH, it never has been specifically and explicitly held, so it gives some space for various theories.”
A SCOTUS ruling would be needed to fully settle it.