I see that the Supremes upheld birthright citizenship. As with so many things, no one way back when could have anticipated the problems and abuses of today. The notion of wholesale birthright citizenship strikes me as absurd. I will be curious to see if the SCOTUS decision rests on substantive grounds (i.e., birthright citizenship is sacred) or procedural ones (i.e., Trump lacked the authority). I gather from the headlines it was something less than a complete endorsement of birthright citizenship, so possibly there is room for Congress to scale it back with something short of a constitutional amendment.
It's always amusing to me when SCOTUS Justices don't vote "the way they were supposed to" according to those who appointed them, as though the SCOTUS were just another political branch. (Off-topic, but one of my absolute favorite quotes is about Justice Hugo Black, who had been a member of the KKK but became a champion of civil rights on the SC: "Justice Black used to go around in white robes scaring Black people. Now he goes around in black robes scaring White people.")