They're coming for, in no particular order:
Migrants, Muslims, trans and other queer people, people with disabilities, the unhoused, climate activists, anti-police/carceral state activists (particularly Black activists operating in this space), anarchists, anti-genocide protestors, teachers, librarians and reproductive rights activists.
They won't stop there of course, fascism NEEDS enemies that must be purged to function; but broadly speaking those are the places they will start.