I'm going to need @Spracne to give me a simple breakdown of what this ruling really means. Seems like a bit of a nothing burger to me.
It's easy to let the imagination run wild and envision a near future in which Trump gets more Putin-y with neither Congress nor SCOTUS blocking him, and a rogue Judge in Oregon or Maryland or something turns his docket into a class-certifying machine, slinging out nationwide preliminary/permanent injunction left, right, and center. Think he could get impeached?
The Court did not rule on the merits of the birthright citizenship question. They punted, in other words. They did take away a powerful tool of the Judiciary but left some pretty obvious workarounds.
What this means in practice is that in 30 days, when lower courts have to rework their rulings, parts of the Executive Order could start taking effect in some states, creating a patchwork where some kids might not get citizenship depending on where they’re born. Sotomayor and the other liberals in their dissent were justifiably concerned with basic fairness and the risks of a fractured system where your rights depend on your zip code.