Every policy that is referred to as "sanctuary city" is 100% legal under the constitution. You can shout until you're bluer in the face than you already are; it doesn't change the fact that there's a 10th Amendment to the constitution, and the 10th Amendment allows these cities to do what they are doing. I don't even much like the 10th Amendment and associated doctrine, but it's the law and it's non-fascist so I can accept it. That's the difference between you and me. You, like a child, judge everything to be right or wrong, good or bad, based on whether you like it. Whereas I act like an adult and use higher order cognitive processes.