Jim, The only thing that the crime rates or gun violence in Chicago and NYC proves is a need for a national standard for firearms regulations. Having tough gun laws in the city or singal state only drives interstate trafficking. It doesn't do NY any good to have tough gun laws when 99% of crime guns come from places like PA, VA, and the Carolinas to name a few that have weak laws.
SethMast, Constitution aside, more regulations at any level of government would do little except to make it difficult for law-abiding citizens to own firearms. This nation has proven it cannot stop millions of people, massive shipments of drugs, or much else from illegally entering from foreign countries.
Chicago's crime is the result of decades of decaying self responsibility, self motivation, morals, ethics, family, and misguided government programs that enable that decay. A hundred years of oppressive national gun laws would not decrease Chicago gun availability to thugs.