Curious why you think it would lose them Texas and Florida? My understanding is illegal immigrants can’t vote (so I’ve been told) and legal immigrants from Central America and Mexico don’t much like illegal immigrants.A) You are still trying to throw out 125+ years of precedent. This isn't Roe where the ruling was made off of a unique interpretation. This is a fundamental statute of American history.
B) Even if you somehow pulled it off where Trump signs an EO, it goes before the court, and they rule for it, it would be political suicide. Republicans would lose the presidency for the next 30 years because both Texas and Florida would go Democrat. There is no path to 270 when those two states are blue.
You raise an interesting point as to if such a decision would be applied retroactively to children and even grand children of illegal immigrants or only on a go forward basis. I’m at the end of my legal rope so I don’t know the answer but you could presumably pass some sort of amnesty for those already born here.
Regardless, I’m with you that we should start a movement to pass an amendment. More Democratic.