And the courts are now King of America? I don't think so!
Unfortunately they act like it. All you need is for those rounded up to start saying they are US citizens. At that point, the onus of proof is on the government (due process) to show otherwise. They just need to say, 'I am a US Citizen and I won't answer questions and I demand a lawyer'. Now they are in the legal system and the government has to formally charge them in order to detain them, which involves showing proof they are not a citizen but in the country illegally. As I pointed out last night, there are 200 immigration judges in the US right now. They handle approximately 1500 cases per year. Divide that by 15 million illegal aliens and at that rate, without increasing the size of government drastically, it would take ten thousand years to process all of them.
It is not as easy as 'round them up and ship them off' as some politicians claim, even if that is ideally what would happen.
Ike and Truman did it without social media or social justice warriors taking every case. They also did it with an illegal population who came under much friendlier circumstances during WWII when they were coming to help and we welcomed them through a 'look the other way' policy. (and even then, the deportations were controversial as many were just trucked down and dumped in the middle of Mexico far away from their homes without the permission of the government there).
I don't have the answer. What I'm saying is that anyone who promises to 'round them up and ship them off' in two years (or four or a decade) without creating an unconstitutional police state is as full of s*** as Bernie Sanders promising free houses and free college.