One of the fiercest gun-control advocates in Congress, Rep. Carolyn McCarthy (D-N.Y.), pounced on the shooting massacre in Tucson Sunday, promising to introduce legislation as soon as Monday. McCarthy ran for Congress after her husband was gunned down and her son seriously injured in a shooting in 1993 on a Long Island commuter train. Pennsylvania Rep. Robert Brady, a Democrat from Philadelphia, told CNN that he also plans to take legislative action. He will introduce a bill that would make it a crime for anyone to use language or symbols that could be seen as threatening or violent against a...