Politics Of Sport: While ads featuring violent movies and video games regularly appear on NFL broadcasts, pro football has banned an ad supporting the Second Amendment. The NFL is within its rights, since Item 5 in its prohibited list of Super Bowl ad categories includes "Firearms, ammunition or other weapons; however, stores that sell firearms and ammunitions (e.g., outdoor stores and camping stores) will be permitted, provided they sell other products and the ads do not mention firearms, ammunition or other weapons." But the ad submitted twice by Daniel Defense does not sell firearms or one of the company's popular...