Before this goes too far I'd like to mention that the entire concept of "sanctuary cities" is absurd. They are just places where the local authorities have recognized that having their local law enforcement agencies trying to do the job of federal immigration enforcement is counter productive to getting their own job done, and said so. The term "sanctuary city" was coined as a pejorative by idiots who don't understand the law in the first place, as demonstrated by their regular rants about how "if these city/state/county authorities don't follow the law they should be jailed." Trying to explain to these clowns that there is no law saying anything like what you seem to think there is is almost always a hopeless situation, because a fellow idiot yelling "sanctuary city bad" is all they need to consider their position bolstered in the face of all facts.
So I object to the casual use of this term of no actual meaning and routine pejorative usage in the thread title.