Since the teachers' unions contribute millions of dollars to the Democrats, only Republicans are free to support vouchers. Violent crime is another social problem that hits blacks especially hard. In some years, there are more blacks than whites murdered in absolute numbers. However, even in high-crime neighborhoods, most people are not criminals, but are more likely to be victims of crime. That is especially true of black ghettos.
Nothing has a proven track record of preventing crime like locking up criminals.
Gun control laws do not actually control guns. Anyone who lives in a high-crime area knows that criminals have access to all the guns they want. Gun control laws simply prevent their intended victims from being able to defend themselves. Incidentally, most uses of guns in self-defense do not even involve pulling the trigger. Once you pull a gun on someone who is threatening to assault you, he is likely to have a very sudden change of plans and head elsewhere.