Even if they were willing, physically moving 20 million people is a huge undertaking that the US really does not have the ability to do. Not only would the cost be outrageous, but coordinating it in 50 states would be an infrastructure nightmare. Now imagine if 25% of them flat out refuse. What are we going to do, shoot them? I really don’t think genocide on home turf will go over well.

They absolutely have the capacity to do this. Some states would resist, and that would limit their success. Many states, however, would not resist and would happily aid the effort.