We already arrest criminals! We already deport criminals who are aliens! In fact, we already deport many aliens who aren’t criminals!
So either Trump is going to find that he ran on solving a problem that is already being solved, or, more likely, he’s going to intern 2 million non-criminals because of racism.
Oh, and he can’t deport 2 million persons in two weeks. He may not be able to do so in two years. But he can kill 'em. That’s doable. Do you understand how Germany got to the “Final Solution” from “Send the Jews to Palestine”? There were years of deliberate removal & concentration of unwanted persons beforehand.