Criminals steal or buy guns illegally. they don't care if there's a 'law' against it. As a liberal you should understand that.  Look at all the laws liberal 'lawmakers' are breaking  by  bringing  'safe injection sites' to Seattle.  A liberal idea. Drugs kill people and they cause people to kill, with guns or other things.  Yet, here in our own state, you have this idea  being pushed by some of the biggest names in liberal politics.   
.
 Chicago is and has been a murder capitol for decades, gun law or no gun law.  They need to enforce the laws that are already on the books before attempting to pass some 'progressive'  'gun' law that only makes the 'progressive'  lawmaker 'feel' good. The criminals won't follow them either. They won't...
.
You will not find many members of the NRA being convicted in Chicago of gun violence.  You can try... Gun violence is caused by gangs, turf, drugs and an outright  disregard for all human life. The guns didn't  do it, evil hearts did it.