Malcolm, welcolm. Sorry, I couldn't resist.
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You hit the nail on the head when you mentioned the lack of sameness in State laws driving this desire for a federal law. I think that desire for the feds to be the solution to problems has put our nation in an awful fix, one from which, I am convinced, we will never recover. I fear the Republic is issuing its dying gasps. But that is another topic.
To an extent, what you lament is what the Framers intended. When the States united, they entered the Union as 13 sovereign nations, surrendering to the federal (at that time, NOT national) government only that which was necessary for the United States to appear as a single entity to the world, for there to be free movement between States as though they were one nation, and a few other practical matters. Internally, they wanted the States to remain sovereign. The Bill of Rights, when it was designed, was only intended to be a restraint on the federal government from intruding on individual and State rights. Only through the Civil War, some really badly written amendments, and some silly rulings by the Supreme Court do we find ourselves in the day of "incorporation," where the feds can use the very Constitution designed to retain the sovereignty of the States over the federal government to allow it to exercise sovereignty over the States. The Civil War was the first sneeze in the illness that killed the Republic.
Oddly enough, the only rights-enshrining amendment that one could argue was not just an arrest on the federal government, but limited all government, was the Second. While the First has the famous words "Congress shall make no law...," the Second makes a much broader injunction with the words "shall not be infringed." Not saying who is barred from infringing, if could be inferred that no governmental entity might infringe.
However, let us assume for the moment that the Framers indeed intended for the States to remain sovereign in the matter of rights, including the Right to Keep and Bear Arms. Their hope was, as illustrated by the republican clause in the Constitution, that the individual States would retain governments of laws and not of men and that those governments would respect all God-given (or natural, if you prefer) rights. Not all Framers even felt the need to enshrine these rights in constitutions. They wanted it left to the People to defend their rights against a rogue government, even to the extent that, "in the course of human events," the People might need to use their Right to Keep and Bear Arms to protect the rest.
This means, of course, that the only possible standardization would be a completely uninfringed Right to Keep and Bear arms in every State, but unenforceable by the feds. It is the People in our bottom-up society who are responsible for reestablishing infringed rights--and then protecting uninfringed rights. Unfortunately, these People of the United States and the several States have too much looked to government at all levels to solve their problems rather than performing the one real purpose of government: to be the structure within which People can live together with all of their God-given rights intact, that is to create a system within which the People can join together to protect each other's rights. Or not. The People of this erstwhile Republic have chosen being nannied over being Free.
Ultimately, it is only the People, working within each State, who can restore our rights and take back the Republic. Unfortunately, they have proven that through election they can't and won't. I fear for the process through which our rights will be restored or that they never will be. However, if they are to be, it will be efforts within the States that accomplishes the restoration, not by petitioning Tyrant Obama to please allow unfettered carry in all States. That which we believe he can allow, we will also sheepishly accept his disallowing. We have the Right to Keep and Bear Arms no matter what he or any other governmental entity says. We need to make each State government and the federal government realize this--hopefully without having to use that Right in a way that
Suzanna Gratia Hupp reminded Chucky Schumer was the ultimate goal of that Right.
[video=youtube;FgrIsuO5PLc]http://www.youtube.com/watch?v=FgrIsuO5PLc[/video]