“They’ve already got national elections sewn up at that point, with or without this law.”
You are correct. What I see here is Democrats preparing for a future with massive majorities in the big cities due to Amnesty. It is conceivable that a Leftist candidate could then get a majority from urban voters while the “flyover” states voted differently, thus creating an Electoral majority without a popular win.
The founders crafted this system to help keep the union intact, it troubles me to watch their intent being subverted.
There is no law, no regulation, no rule, no Constitution that the Left cannot subvert.
That is what they do!