In a recent statement, the NRA claimed that:
Expanding background checks at gun shows will not prevent the next shooting, will not solve violent crime and will not keep our kids safe in schools. While the overwhelming rejection of President Obama and Mayor Bloomberg's "universal" background check agenda is a positive development, we have a broken mental health system that is not going to be fixed with more background checks at gun shows. The sad truth is that no background check would have prevented the tragedies in Newtown, Aurora or Tucson. We need a serious and meaningful solution that addresses crime in cities like Chicago, addresses mental health deficiencies, while at the same time protecting the rights of those of us who are not a danger to anyone.
Are there any data to support or dispute this claim? Would the expanded background checks of the Toomey-Manchin proposal have prevented the incidents NRA mentions or other shooting incidents in the recent past, assuming they were in place at the time?