It's not that hard as long as the red tape is cleared, so to speak. I used to be a trouble maker up until my young 20s. Saw the insides of too many different jails(not proud of it). I saw plenty of people get deported, once arrested and tried. The logistics of 20 million people, who may not have committed a crime besides trespassing, is hard to wrap your head around, but it can be done in time. Also, did Chris Hayes just admit there were 20 million illegals in the states? That's a start, but they've been using those small figures since the early 2000s. More than safe to double that number.