NumbersUSA is ALL about stopping illegal immigration. It was just in this particular video that he addressed only legal immigration. Personally, I think its even more effective to show the consequences of our current level of LEGAL immigration . . and then its easy to see how foolish it would be to either ignore illegal immigration or (as many pols today advocate) making it easier for those who enter illegally to become legal residents. Any was you look at it, I think it should be clear to any reasonable person that excessive immigration is a major problem for the U.S.