The National Rifle Association is launching a preemptive attack on anticipated Democratic attempts to tighten gun control. The weapon: an illustrated pamphlet titled "Freedom in Peril.” A draft of the document, which was recently leaked to the Internet, begins: "Second Amendment freedom stands naked in the path of a marching axis of adversaries far darker and more dangerous than gun owners have ever known. Acting alone and in shadowy coalitions, these enemies of freedom are preparing for a profound and foreboding confrontation in which they will not make the mistakes of their predecessors. We’d better be ready.” The opening essay,...