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Social Policy and Politics - HMNS 207 - Gutshall-Seidman
Sometimes finding what the opposition thinks about a policy can be difficult, particularly if the opposition is in the minority. You may need to follow the trail of a few sources in order to get to a reliable source of information and sift through search results.
A Google search for "deferred action for childhood arrivals opposition" returns
Feb 23, 2017 - Two recipients of the DACA program (Differed Action for Childhood Arrivals) share their reaction to President Trump's immigration enforcement speech.
This is a news article from an affiliate of USA Today out of Memphis Tennessee. The article itself is clearly biased in opposition to the program, but doesn't really identify how the conclusions are drawn. The author is identified at the end of the article as Dan Stein, the president of the Federation for Immigration Reform. A good search strategy would be to look up that organization and find policy statements related to DACA.