[coloradan]

Adoption of the entire Constitution rested on the adoption of the Bill Of Rights, which makes repeal of those provisions tantamount to rejecting the entire thing. Note that the gun grabbers aren't advancing proposals to repeal the Second Amendment, but rather arguing that it doesn't mean what it says (militia = National Guard, only) and misinterpreting Miller, etc.

[Libertarianize the GOP]

A Constitution can only slow an overwhelming majority down, not prevent their actions. In the end it is not much different than a super majority requirement.