 Two co-defendants were also found guilty. Senate Majority Leader Chuck Schumer called on Menendez to resign immediately. Menendez insists he's innocent. Signs of trouble at Saturday's Trump rally in Pennsylvania were evident before the gunmen opened fire. Correspondent Julie Walker reports. Police had a report of a suspicious man. We're apparently exchanging photos. Witnesses pointed and shouted at an armed man on the roof. Butler Township Manager Tom Knight says an officer was hoisted up.