The US has so much land and so much economic capacity to add people (most of those people are already in the economic system so the US will have more trouble removing them than legalizing them) that the current illegal immigrants are not an issue at all. The US obviously needs to get better control of the borders (which it has for the past decade) but the only sensible, economically effective and not to mention humane way to deal with people already here is to provide them with legal status so they don’t remain an unprotected and therefore cheaper competitor for jobs.