Chicago proves that gun control doesn't work.
I agree. It's never routine when I need to travel through or near Chicago. Failed gun control policies are one part of the many issues there, and many other places in the US. Would better policies have changed the Las Vegas terrorist attack? Not directly.
Political debate over added proposed rules isn't productive to make the US safer again. That will require a culture change towards pervasive goodness, and aggressive opposition to evil mindsets and unconstitutional policies that encourage evil to grow and multiply.