(disclaimer: I am of neither party)
The Republicans face a real challenge in trying to win the next election; namely demographics. Simply put, unless Republicans make in-roads with black and Hispanic voters, they are simply going to be out-voted, if not in 2016 then in 2020. The demographic trends of this country are such that whites, who vote more Republican than Democrat on balance, will be a minority of the electorate.
I have heard arguments that Republicans simply need to get more white voter turn-out, and I believe many of the voter ID laws (and in particular getting rid of early voting on Sunday, which is a traditional black voting day) are aimed squarely at trying to suppress as much of the black/Hispanic vote as possible. Studies of voter impersonation suggest that such a crime is infrequent at best, and most likely quite rare. And yet 12% of the voting populace to not possess the necessary identification to vote; of that 12%, it is overwhelmingly blacks and Hispanics.
While I tend to agree largely with the Scalia decision in DC v. Heller, I generally have a lot of disdain for Scalia as he is a strict historical Constructionalist, which quite frankly doesn't make a lot of sense in my mind. I firmly believe that the Founding Fathers, while unable to see the future, intended for the Constitution to evolve with the times, otherwise they would not have included the amendment process. Scalia is an originalist, or at least claims to be, but often times his decisions contradict what he claims is his own Constitutional philosophy. If there's one thing I hate, its inconsistency.
For example, Scalia has written and spoken that he feels the detainment of 'enemy combatants' without the right of Habeus Corpus is justified, while I see nothing in the Constitution nor in the Founding Father intent that would suggest such an opinion. Another example is State's rights, which Scalia is generally a proponent of, however he ruled in Gonzales v. Raich that the Federal government had the power to interfere with state's individual laws by virtue of the Commerce clause. Furthermore, Scalia does not agree with Miranda, which is honestly boggling to my mind; I firmly believe that police have a duty to inform you of your Constitutional rights when you are arrested, but clearly Scalia does not.
Obviously others will disagree with me, and view Scalia as the preeminent conservative on the court, which of course he is.
It would be best if we could find SCOTUS judges who are not biased towards one party affiliation or another, and simply interpret the law to the best of their abilities. Of course that raises many questions on what type of Constructionalist is ideal for the court, be it strict or 'evolving'.
As far as the 2A goes in advancing and promoting it, I think the NRA has done a great deal of damage by constantly suggesting that the 2A is under attack in some form or another, when often times those so-called 'assaults' will never become law (for example, the UN treaty stuff). The NRA continually cries 'wolf' in order to get more money, regardless of the 2A legal environment at the time. Personally, I would rather see the NRA focus more on sportsmanship, competition, and safety, promoting responsible gun ownership rather than the militant stance they tend to take now against anything and everything gun-related.
(And yes, I am a reluctant member of the NRA)