US immigration goes beyond just the President's personal views and desires. The present situation is pretty difficult for many would-be immigrants, even those from middle class backgrounds in stable countries. If they lack a degree or their degree isn't recognized, they can't easily get a work visa (for permanent resident status, not temporary workers). They have to get married, go for the diversity visa program, or become a student (may be their second or third degree for some if they go this route).