Helen Comperatore, the widow of Corey Comperatore, who was shot and killed at a campaign rally in Butler, Pennsylvania, by a bullet intended for President Trump last July, has no love lost for the Secret Service. “I think the Secret Service is garbage,” she told The Post. “All I’ve wanted this entire time was to sit down with the men who screwed up that day and find out why. Why? Why at that rally? Why at that one in Butler?” she asked incredulously. “...Why were you such a mess in Butler? Were you told to be a mess?"... The agency’s...