. >> reporter: tonight, congressman joe war tobarton, tr with his sons both at the baseball field, is attending a dinner at the democratic club that his colleagues across the aisle are hosting for the republican team. past accidents of violence toward members of congress have also sparked calls for unity. >> is anybody injured? did you say gabrielle giffords is hit? >> she's hit. i do believe she's breathing. there's multiple people shot. >> reporter: 2011, representative gabrielle giffords was shot at point-blank range in the head during a meeting with her constituents in a supermarket parking lot in tucson, arizona. despite calls for increased civility in our political discourse that came in the aftermath, the spirit did not last. and indeed today it took just hours after the attack for the familiar debate about gun violence to be reawakened with the democratic governor of virginia weighing in. >> i have long advocated, this is not what today is about, but there are too many guns on the street. >> reporter: texas congressman roger williams, a republican who was injured during today'