Why in the face of globalization (and now increased automation) the U.S. continues to have an effectively open-door policy to low-skill workers makes no sense at all.
As a U.S. citizen, I'd like to see a return to the temporary moratorium that existed until the mid 1960s (say 10 to 15 years) on most immigration beyond high-skill (however that is defined) and an end to "chain migration" in which entire families are allowed to immigrate regardless of most other factors.