Some gun-rights supporters say the Second Amendment’s purpose is not merely to protect the right to hunt or defend yourself, but to guard against oppression, notes A. Barton Hinkle.

Many progressives say this is just plain nuts. Yet many on the left genuinely believed, only a few years ago, that the United States really did stand in the dusky shadow of a totalitarian nightmare. Yet now they insist that Americans who want to arm against that eventuality are paranoid nut jobs.