Why was that misleading debate question even allowed?
There are not a bunch of AK-47s "on the streets".
Uninformed soccer moms will take this and interpret it to mean that there is currently a glut of full-auto AKs being sold out of hot dog stands on each street corner.
Obama himself said that criminals and gangbangers don't even utilize AKs in their crimes, and admitted that his home city of Chicago (despite having among the worst records on gun rights and some of the most restrictive laws anywhere) has crimes committed by youths with handguns instead of quote-unquote "assault weapons".
I hope beyond hope that your average voter doesn't think AWB-redux has any chance of preventing mass shootings or street crime.
"A government big enough to give you everything you want is a government big enough to take from you everything you have."
- Gerald R. Ford