The question: Should the US have a national policy regarding deeply-contested, regionally-concentrated  controversies, such as abortion, or would we be better off letting different states have different regimes?

Answer should be in a form of answer: that is; you should begin by laying out what you think the answer to the question is, then presenting evidence in favor of that answer.  The best papers will look at other possible answers and say why what is wrong with those alternatives.