The case with Jindal parents returning to India is irrelevant according to the Elg (307 US 325) Supreme court case.
Anchor babies....now that is a situation about which I’d make a law. When neither parent is already a US citizen, I would support a law that required a declaration of intention to pursue citizenship and a renunciation of other citizenships before I’d allow the child to be a citizen. And, I’d require it to be naturalized along with the parents.
Just my personal preference. And it relates to Cruz, because applied to Cruz in Canada, he never would have had their citizenship.