1897.1 Assessment
Research Question (Clear, unambiguous) "Does exposure to gun violence effect views on gun control policies?"  The question seems a bit too general.  The alternative, that exposure to gun violence has no effect seems so unlikely, that doing research to show it untrue appears pointless.  So, the question needs greater specification.
Relevant Literature The cited articles seem relevant, but not particularly valuable.  Should indicate where to go from here.
Causal Interpretations (clear, all parts defined, mechanisms, controls, plausible) Well, assuming exposure to gun violence has some effect, it does indeed have to be in one direction or another, but saying that is not really offering a causal interpretation.  Consider what are the contingent conditions under which we might expect the effect to go in one direction or another.  
Data (variables, sample, comparison) Okay on the two variables, but really, they are just the beginning, not the conclusion of the data needs.
Research Value The policy value of the research seems illusive.  We can't expose people to gun violence to change their attitudes and is not obvious why knowing any causal relationship would change anyone's mind about it.  It is more likely a contribution to people interested in the explanation of attitudes.
Overall The question of support for (or opposition to) gun control is worthwhile.  It is not obvious that this proposed project adds much in its current bare bones form.