Kerry's Anti-War Past Is a Delicate Issue in Campaign By DAVID M. HALBFINGER, The New York Times When questions were raised last month about whether a 27-year-old John Kerry had attended a Kansas City meeting of Vietnam Veterans Against the War where the assassination of senators was discussed, the Kerry presidential campaign went into action. It accepted the resignation of a campaign volunteer in Florida, Scott Camil, the member of the antiwar group who raised the idea in November 1971 of killing politicians who backed the war. The campaign pressed other veterans who were in Kansas City, Mo., 33 years...