New Trajectory asks:
In your comment, please suggest an issue that YOU feel both sides can agree (like that too many criminals get guns), and what you would do to help that issue.  As Obama said, keep it civil and honest.  Links to positive articles are welcome.  Please don’t write a book, and please keep it to one suggestion and solution, in the interest of space and simplifying the conversation.  This should get us talking.
I agree too many criminals get guns, but the argument is over, at root, what can be done about it. I will say this categorically: there is no gun control I believe that works effectively at reducing criminal access to guns. At best, our existing laws have only a marginal effect.
Even if you assume a starting state of no guns, which is a fantasy, the only way you can reduce availability to criminals is to reduce availability to the law abiding. And note the word reduce. You will never eliminate criminal gun possession, even if your starting point is a society without guns.
But we’re not a society without guns, and therefore even total prohibition would still mean a very high availability of guns for criminals, with no concurrent availability to the law abiding for defense against those criminals. The end result will be that many otherwise law abiding people will keep guns illegally, which will continue to feed another violent black market, in the same manner that’s happened because of drug prohibition. Not to mention such laws would turn ordinary people into criminals themselves for no greater crime than wanting to protect themselves and their families.
So I don’t think there is common understanding, because you’re starting from the premise that gun control can be effective. I don’t think it can be. So it really comes down to, what set of useless laws am I willing to live with in order to make enough people who are wary of guns comfortable enough to not spend their time and money trying to pass more and more regulations. That’s the better question.