This isn’t necessarily a Trumpian scheme, but people feel emboldened to question “non-Americans” right now, and some of those people are in bureaucratic positions. This will be used for voter suppression… it’s more than the GOP ever dreamed to ask for.
Remember when in the “free” world, “Papers, please” was something only horribly repressive places did? Where the idea that you needed identification to travel within your own borders was ridiculous? It could never happen here, right?