Article about the Act and Kennedy’s involvement:
http://en.wikipedia.org/wiki/Immigration_and_Nationality_Act_of_1965
Article about an anti illegal program that worked:
http://en.wikipedia.org/wiki/Operation_Wetback
I don’t know that wetback really worked.
I recall lots of migrant mexican field workers in Ohio back in the 60s
One thing is different between now and then and that is that is the Nationality and immigration act of 1965.
Prior to 65 migrant workers came here to do work and then returned home.
Now they stay.