It's an old, sarcastic argument but an interesting one, especially considering how ubiquitous metal detectors and purse searches are throughout Washington, D.C., and how many friends the National Rifle Association has in Congress: Why should Second Amendment rights stop at the Capitol steps? "Congress seems to think that gun restrictions are for wimps," wrote Washington Post columnist E.J. Dionne. "It voted this year to allow people to bring their weapons into national parks, and pro-gun legislators have pushed for the right to carry in taverns, colleges and workplaces. Shouldn't Congress set an example in its own workplace?"