Chicago already has draconian gun control, yet it has among the highest violent crime rates in the USA. Gun control doesn't work, dear. Criminals do not obey the law. They don't buy guns in gunstores, they buy them the same place they get their crack and meth.
Lawful gun owners are not the problem. The myth of lawful gun owners "snapping" and killing someone in any significant percentage is just that, a myth. It happens very rarely.
Criminals are the problem. We need criminal control, not gun control.
Gun control increases crime. It's been shown over and over; when the law-abiding are disarmed, criminals (who get weapons anyway, illegally, on the black market) are made bolder because they have less fear that their victims will be armed. I've known lots of criminals... two things they fear are big aggressive dogs and citizens with guns (both related to defensive force). They don't fear words written on paper (laws). Many of them don't fear the cops or prison. They fear being shot dead in the act by an armed victim.
Given the current court and the Heller decision, it seems probable that the court will rule against Chicago. I sincerely hope that it is so. I treasure the Second Amendment just as much as I do the First Amendment.
Tell you what, you don't step on my rights, I won't step on yours. I'll trade you nation-wide gay marriage for a nationwide unrestricted right to keep and carry arms. (Oops, there's the Libertarian in me coming out again )