Gun owners have long been the hypochondriacs of American politics. Over the past twenty years, the gun-rights movement has won just about every battle it has fought; states have passed at least a hundred laws loosening gun restrictions since President Obama took office. Yet the National Rifle Association has continued to insist that government confiscation of privately owned firearms is nigh. After the U.S. Supreme Court ruled in District of Columbia v. Heller, in 2008, that comprehensive gun bans were “off the table,” the NRA insisted that because gun owners were becoming complacent, “our firearms freedoms may be in…