This article from the NY Times outlines the nuanced differences between the Obama and Bush administrations on immigration enforcement. Although Neopolitano emphasizes that border security and employer sanctions are the focus and only undocumented criminal immigrants are deported, there is still probably too much emphasis (and money) being poured into border security.
I know the administration feels pressured to "prove" toughness on immigration enforcement, but I would rather see some of our democratic leaders show some back bone and start to stand down the right-wing opponents who represent themselves but nevertheless seem to always make their numbers look much larger and significant than they are. Border security doesn't work. We all know that. Why not try to demonstrate a better way and let the evidence of that success speak for itself?