Chicago has a lot of murder and crime in general. It would be nice to clean that up, but I'm not sure if the Feds can do it better than the police. I went to high school in the suburb of Cicero, home to Al Capone. I never felt really safe there, although I survived. I was mugged once and another time took a beating from a gang that would cruise around and randomly beat up people as part of their Friday night recreation. I feel safer in the woods a half mile from my nearest neighbors, not to say some asshole could never bother me here, but I don't feel I need to worry about it. I actually feel like we don't even need any police where I live. In Chicago, I'd want a cop within shouting distance all the time. Last time I rode the subway, there were signs in the cars that read, "If you feel like you are in danger, move to another car." At one stop, a cop got on with a muzzled attack dog, rode the subway for two stops and got off. I suppose it was a trouble spot. I saw a woman have her purse snatched on the subway one time.
There is a lot of culture in Chicago, with great museums of science, natural history, art, and interesting cultural events that reside in the midst of assault and crime. But then I lived in San Pedro, California for 6 months, and that seemed even less safe. You had all of Chicago's crime, without the culture.
But I have no idea how you clean those places up.