A quick article from the Washington Post on why the 1986 immigration overhaul didn’t accomplish what it was intended to do:

http://www.washingtonpost.com/blogs/wonkblog/wp/2013/01/30/in-1986-congress-tried-to-solve-immigration-why-didnt-it-work/

What are the assurances in current proposals that they will be more successful at providing a path to legal status, accommodating employer demand (without greasing the wheels for exploitation), and enforcing the border (which is as much a national security issue at this point as an economic one)?