Sure, that's why the Constitution can be amended!
Exactly.
Interestingly, we have few discussions today about possible amendments. Probably because the "modification" of the constitution is presently being routinely handled by the Supremes.
Actually there is a mechanism built into the structure of the Constitution that creates a giant Presidential loophole making an effective end run around the amendment process.
The TREATY MAKING POWERS of the Executive branch trump nearly everything. The Framers knew that it was going to be important for any future President to make agreements, binding agreements with foreign governments. The check & balance to this power is the requirement that any treaty be ratified by the Senate (only the Senate -- not the House, too) in order to become the Law of the Land. It's a power that cuts across the entire constitution and it's legal because it is a part of the original ratified document.
So here is the nightmare scenario: Hillary becomes the US President in 2008. Her husband Bill becomes UN Secretary General at the same time. They agree on an international treaty that bans worldwide possession of all small arms of any caliber or type of action, for the goal of ~snicker snicker~ "Global Peace" and the recently installed DEMOCRAT SENATE ratifies it...guess what boys and girls? It's LAW and it's LEGAL. Now from a sociological point of view, whether it would spark another American Revolution or if all we'd get is a sample of New Orleans but on a much larger scale I can't say. But I suspect the sheep will bleat and whine and turn their guns into the government....