Yes, in that context. It was extremely common to shorthand that to "illegals", as in, "Bob says he's gotta hire illegals or he can't find anyone who'll shingle houses for him", or, "I don't know why they can't mine the border to stop the illegals" (I guess I can assign that as a position the Republicans "shifted" to and then blame them for it since I've heard multiple actual Republican voters say it, no interpretation required, they literally stated they want a minefield on the border? That'd be more connected to reality than the rest of this nonsense thread).

Democrats have been pushing back on the language of that, because "illegals" had plainly become a slur and tool for othering and dehumanizing. I think democrats focus on that horse-shit way too much—though, then again, shifting language that way as that kind of political tool is something Republicans do and had done in this case, so maybe I'm wrong and they're right for trying to stop it—but that's what the sign's about, it's a topic they've had a bug up their ass about for like twenty damn years.

That doesn't fit with how they've started trying to replace the term "illegal immigrant" with "undocumented immigrant".

You wrote "doesn't fit" and then described something that fits entirely. I'm not following.