uspol, racism, paranoia
I kinda feel like our government's current take on immigrants doesn't just appeal to racists, provide free labor and make money for allies (lots of stuff up for bid, and bids aren't likely to be determined fairly in this administration).
The more people come here undocumented, the more wind up being naturalized at some point, and Catholicism probably no longer keeps Latino voters leaning right. My cynicism suggests it's partly trying to keep opposition votes down.