WASHINGTON — It doesn't seem to be a main theme of the National Rifle Association meeting in Pittsburgh, but the NRA has been floating an idea that could force its critics — and Congress and the courts — to confront some uncomfortable First Amendment questions. Last December, as the U.S. Supreme Court was weighing the constitutionality of the McCain-Feingold campaign-finance law, NRA Executive Vice President Wayne LaPierre said the group was exploring the idea... (GunPolicy.org)