A recent Pew Research Center survey found that the majority of Americans are behind major immigration reform:
http://www.pewresearch.org/fact-tank/2013/05/22/majority-of-americans-say-immigration-policy-needs-sweeping-changes/
http://www.pewresearch.org/fact-tank/2013/05/22/majority-of-americans-say-immigration-policy-needs-sweeping-changes/