Do they have a plan to deal with the 11 million relatives and friends who will visit with a tourist visa and never go home? They come legally. They just don't go home. That's a whole other ball of chaos.
Also, I know it's not "PC" to say this, but has anyone seen those cable documentaries on the takeover of parts of Denver, Dallas, L.A., San Joaquin Valley, Northern Virginia, and countless other cities and regions by murderous gangs? Even if some were born here, their parents or grandparents came illegally, so the ripple effect is obviously devastating.